Канал: Sir Jahrel's Flipped Classroom Videos

Trigonometric Integrals: Powers of Sine and Cosine Functions

Trigonometric Integrals: Powers of Sine and Cosine Functions

Trigonometric Integrals: Integration of Quotient and Reciprocal Functions

Trigonometric Integrals: Integration of Quotient and Reciprocal Functions

Integration By Parts

Integration By Parts

Trigonometric Integrals: Products of Sine and Cosine Functions

Trigonometric Integrals: Products of Sine and Cosine Functions

The Tangent Line Problem

The Tangent Line Problem

Derivatives of General Exponential and Logarithmic Functions & Logarithmic Differentiation

Derivatives of General Exponential and Logarithmic Functions & Logarithmic Differentiation

Derivatives of Other Functions: Inverse Trigonometric, Natural Logarithmic, Natural Exponential

Derivatives of Other Functions: Inverse Trigonometric, Natural Logarithmic, Natural Exponential

Derivatives of Trigonometric Functions, Higher-Order Derivatives & Implicit Differentiation

Derivatives of Trigonometric Functions, Higher-Order Derivatives & Implicit Differentiation

Basic Differentiation Rules (Algebraic Functions)

Basic Differentiation Rules (Algebraic Functions)

Kruskal-Wallis Test (with Post-Hoc Test) using XLSTAT

Kruskal-Wallis Test (with Post-Hoc Test) using XLSTAT

Wilcoxon Signed Rank Test for Paired Samples and Mann-Whitney U Test using XLSTAT

Wilcoxon Signed Rank Test for Paired Samples and Mann-Whitney U Test using XLSTAT

Runs Test for Randomness and Wilcoxon Signed Rank Test for One Sample in XLSTAT

Runs Test for Randomness and Wilcoxon Signed Rank Test for One Sample in XLSTAT

Intro to Nonparametric Statistics and Test for Normality using XLSTAT

Intro to Nonparametric Statistics and Test for Normality using XLSTAT

Higher-Order Partial Derivatives, Chain Rule of Partial Differentiation, & Implicit Differentiation

Higher-Order Partial Derivatives, Chain Rule of Partial Differentiation, & Implicit Differentiation

Partial Derivatives as Slopes and Rates of Change

Partial Derivatives as Slopes and Rates of Change

Introduction to Partial Differentiation

Introduction to Partial Differentiation

z-test on Two Sample Proportions Computed On Microsoft Excel

z-test on Two Sample Proportions Computed On Microsoft Excel

t-test of Dependent/Paired Samples/Means

t-test of Dependent/Paired Samples/Means

t-test of Independent Means/Samples Using Microsoft Excel

t-test of Independent Means/Samples Using Microsoft Excel

z-test on Two Population Parameters Using Microsoft Excel

z-test on Two Population Parameters Using Microsoft Excel

Intro to Hypothesis Test on Two Pop Parameters and F-test Two Sample Variances Using Microsoft Excel

Intro to Hypothesis Test on Two Pop Parameters and F-test Two Sample Variances Using Microsoft Excel

One-Population z-test (Non-Computer)

One-Population z-test (Non-Computer)

Principles of Hypothesis Testing Part 2

Principles of Hypothesis Testing Part 2

Principles of Hypothesis Testing Part 1

Principles of Hypothesis Testing Part 1

Applications of the Derivative: Linear Approximation

Applications of the Derivative: Linear Approximation

Applications of the Derivative: Optimization

Applications of the Derivative: Optimization

Related Rates

Related Rates

Rectilinear Motion

Rectilinear Motion

Derivative as Rate of Change

Derivative as Rate of Change

Sampling Distribution of the Mean

Sampling Distribution of the Mean

Sampling Distribution of Sample Proportion and Finite Population Correction

Sampling Distribution of Sample Proportion and Finite Population Correction

Limits at Infinity, Infinite Limits at Infinity, Horizontal Asymptotes

Limits at Infinity, Infinite Limits at Infinity, Horizontal Asymptotes

Continuity at a Point

Continuity at a Point

Infinite Limits and Vertical Asymptotes

Infinite Limits and Vertical Asymptotes

Solid Geometry 2: Polyhedrons, Prisms, and Cylinders

Solid Geometry 2: Polyhedrons, Prisms, and Cylinders

Solid Geometry 3: Pyramids, Cones, Spheres

Solid Geometry 3: Pyramids, Cones, Spheres

Essential Solid Geometry for Calculus 1: Introduction and Basic Terms

Essential Solid Geometry for Calculus 1: Introduction and Basic Terms

Hyperbola 2: Sample Problems

Hyperbola 2: Sample Problems

Hyperbola 1: Introduction, Derivation, Standard Forms, and Parts

Hyperbola 1: Introduction, Derivation, Standard Forms, and Parts

Parabola 2: Sample Problems

Parabola 2: Sample Problems

Parabola 1: Introduction, Derivation, Standard Forms

Parabola 1: Introduction, Derivation, Standard Forms

Ellipse Part 2: Sample Problems

Ellipse Part 2: Sample Problems

Ellipse Part 1: Introduction and Derivation of Equation in Standard Form

Ellipse Part 1: Introduction and Derivation of Equation in Standard Form

Polar Graphs Part 2: Limaçons and Roses

Polar Graphs Part 2: Limaçons and Roses

Polar Graphs Part 3: Lemniscates

Polar Graphs Part 3: Lemniscates

Polar Graphs Part 1: Introduction

Polar Graphs Part 1: Introduction

The Polar Coordinate System

The Polar Coordinate System

Other Concepts About Conics (Types of Conics and Translation of Axes)

Other Concepts About Conics (Types of Conics and Translation of Axes)

The Line Part 2 (Forms of Linear Equations More Examples)

The Line Part 2 (Forms of Linear Equations More Examples)

The Line Part 1 (Forms of Linear Equations)

The Line Part 1 (Forms of Linear Equations)

Slope and Inclination of a Line

Slope and Inclination of a Line

Midpoint Between Two Points

Midpoint Between Two Points

Introduction to Conics

Introduction to Conics

Introduction to Analytic Geometry

Introduction to Analytic Geometry

Equation of Locus

Equation of Locus

Division of a Line Segment

Division of a Line Segment

Distance Between Two Points

Distance Between Two Points

Directed Distance Between a Line and a Point 2 (More Sample Problems)

Directed Distance Between a Line and a Point 2 (More Sample Problems)

Directed Distance Between a Line and a Point 1 (Definitions, Formulas, Sample Exercises)

Directed Distance Between a Line and a Point 1 (Definitions, Formulas, Sample Exercises)

Circles 2 (Sample Exercises)

Circles 2 (Sample Exercises)

Circles 1 (Definition of a Circle, Center-Radius Form, and General Form of the Equation of a Circle)

Circles 1 (Definition of a Circle, Center-Radius Form, and General Form of the Equation of a Circle)

Determinants and Elementary Operations: Matrices and Zero Determinants

Determinants and Elementary Operations: Matrices and Zero Determinants

Determinants and Elementary Operations: Determinants and the Elementary Column Operations

Determinants and Elementary Operations: Determinants and the Elementary Column Operations

Determinants and Elementary Operations: Finding the Determinant with the Elementary Row Operations

Determinants and Elementary Operations: Finding the Determinant with the Elementary Row Operations

Determinants and Elementary Operations: The Effect of Elementary Operations on the Determinant

Determinants and Elementary Operations: The Effect of Elementary Operations on the Determinant

Determinants: Triangular Matrices and their Determinants

Determinants: Triangular Matrices and their Determinants

Determinants: The Determinant of a 3x3 Matrix

Determinants: The Determinant of a 3x3 Matrix

Determinants: Example of Cofactor Expansion

Determinants: Example of Cofactor Expansion

Determinants: Definition of the Determinant of a Square Matrix and Cofactor Expansion

Determinants: Definition of the Determinant of a Square Matrix and Cofactor Expansion

Determinants: Minors and Cofactors

Determinants: Minors and Cofactors

Determinants: The Notion of a Determinant and the Determinant of a 2x2 Matrix

Determinants: The Notion of a Determinant and the Determinant of a 2x2 Matrix

Bayes' Theorem: Sample Problem for More Than Two Events

Bayes' Theorem: Sample Problem for More Than Two Events

Bayes' Theorem: Formula for More Than Two Events

Bayes' Theorem: Formula for More Than Two Events

Bayes' Theorem: Sample Problem (2)

Bayes' Theorem: Sample Problem (2)

Bayes' Theorem: Sample Problem (1)

Bayes' Theorem: Sample Problem (1)

Bayes' Theorem: Formal Definition

Bayes' Theorem: Formal Definition

Bayes' Theorem: Introduction (2)

Bayes' Theorem: Introduction (2)

Bayes' Theorem: Introduction (1)

Bayes' Theorem: Introduction (1)

Conditional Probability: Examples of Independent Events

Conditional Probability: Examples of Independent Events

Conditional Probability: Definition of Independent Events

Conditional Probability: Definition of Independent Events

Conditional Probability: General Multiplication Rule

Conditional Probability: General Multiplication Rule

Conditional Probability: Axioms, Theorems, and More Examples

Conditional Probability: Axioms, Theorems, and More Examples

Conditional Probability: Examples

Conditional Probability: Examples

Conditional Probability: Definition and Formula

Conditional Probability: Definition and Formula

Conditional Probability: Introduction

Conditional Probability: Introduction

Cryptography as an Application of Matrix Operations: Decoding a Message Examples

Cryptography as an Application of Matrix Operations: Decoding a Message Examples

Cryptography as an Application of Matrix Operations: Decoding a Message

Cryptography as an Application of Matrix Operations: Decoding a Message

Cryptography as an Application of Matrix Operations: Encoding a Message Examples

Cryptography as an Application of Matrix Operations: Encoding a Message Examples

Cryptography as an Application of Matrix Operations: Encoding a Message

Cryptography as an Application of Matrix Operations: Encoding a Message

Inverse of a Matrix: Systems of Equations with Unique Solutions (Invertible Matrix Method)

Inverse of a Matrix: Systems of Equations with Unique Solutions (Invertible Matrix Method)

Inverse of a Matrix: The Inverse of a Product of Two Matrices

Inverse of a Matrix: The Inverse of a Product of Two Matrices

Inverse of a Matrix: Finding the Inverse of 2 x 2 Matrices and Properties of Inverse Matrices

Inverse of a Matrix: Finding the Inverse of 2 x 2 Matrices and Properties of Inverse Matrices

Inverse of a Matrix: Finding the Inverse of a Matrix

Inverse of a Matrix: Finding the Inverse of a Matrix

Inverse of a Matrix: Definition of the Inverse of a Matrix

Inverse of a Matrix: Definition of the Inverse of a Matrix

Properties of Probabilities: Odds in Favor of an Event

Properties of Probabilities: Odds in Favor of an Event

Properties of Probabilities: Sample Problems

Properties of Probabilities: Sample Problems

Properties of Probabilities: Axioms and Theorems on Probability

Properties of Probabilities: Axioms and Theorems on Probability

The Properties of Probabilities: Probability Assignment

The Properties of Probabilities: Probability Assignment

Introduction to Discrete Probability: Sample Problems

Introduction to Discrete Probability: Sample Problems

Introduction to Discrete Probability: Definition of Probability and Mutually Exclusive Events

Introduction to Discrete Probability: Definition of Probability and Mutually Exclusive Events

Introduction to Discrete Probability: Subsets and Events, and Equally Likely Events

Introduction to Discrete Probability: Subsets and Events, and Equally Likely Events

Introduction to Discrete Probability: Basic Terms

Introduction to Discrete Probability: Basic Terms

Properties of Matrix Operations: The Identity Matrix and Repeated Multiplication of Square Matrices

Properties of Matrix Operations: The Identity Matrix and Repeated Multiplication of Square Matrices

Properties of Matrix Operations: Examples (3)

Properties of Matrix Operations: Examples (3)

Properties of Matrix Operations: Examples (2)

Properties of Matrix Operations: Examples (2)

Properties of Matrix Operations: Examples (1)

Properties of Matrix Operations: Examples (1)

Properties of Matrix Operations: The Transpose of a Matrix

Properties of Matrix Operations: The Transpose of a Matrix

Properties of Matrix Operations: Properties of Matrix Multiplication

Properties of Matrix Operations: Properties of Matrix Multiplication

Properties of Matrix Operations: The Zero Matrix and Solving Matrix Equations

Properties of Matrix Operations: The Zero Matrix and Solving Matrix Equations

Properties of Matrix Operations: Properties of Matrix Addition and Scalar Multiplication

Properties of Matrix Operations: Properties of Matrix Addition and Scalar Multiplication

Operations on Matrices: Sample Operations (2)

Operations on Matrices: Sample Operations (2)

Operations on Matrices: Sample Operations (1)

Operations on Matrices: Sample Operations (1)

Operations on Matrices: Matrix Multiplication - its Commutativity and Representing a SLE

Operations on Matrices: Matrix Multiplication - its Commutativity and Representing a SLE

Operations on Matrices: Definition of Matrix Multiplication

Operations on Matrices: Definition of Matrix Multiplication

Operations on Matrices: Matrix Addition, Scalar Multiplication, and Matrix Subtraction

Operations on Matrices: Matrix Addition, Scalar Multiplication, and Matrix Subtraction

Operations on Matrices: Basic Terms and the Equality of Matrices

Operations on Matrices: Basic Terms and the Equality of Matrices

Combination: Sample Problems (2)

Combination: Sample Problems (2)

Combination: Sample Problems (1)

Combination: Sample Problems (1)

Combination: Definition

Combination: Definition

Permutation: Circular Permutation

Permutation: Circular Permutation

Permutation: Permutation of Repeating Objects

Permutation: Permutation of Repeating Objects

Permutation: Sample Problems for Permutation of n objects taken r objects at a time

Permutation: Sample Problems for Permutation of n objects taken r objects at a time

Permutation: Definition of Permutation of n objects taken r objects at a time

Permutation: Definition of Permutation of n objects taken r objects at a time

Permutation: The Factorial Notation

Permutation: The Factorial Notation

Permutation: Introduction and Definition of Permutation of all n objects

Permutation: Introduction and Definition of Permutation of all n objects

Fundamental Principle of Counting: The Addition Rule

Fundamental Principle of Counting: The Addition Rule

Fundamental Principle of Counting: Examples (1)

Fundamental Principle of Counting: Examples (1)

Fundamental Principle of Counting: Definition

Fundamental Principle of Counting: Definition

Fundamental Principle of Counting: Introduction Problem

Fundamental Principle of Counting: Introduction Problem

Applications of Systems of Linear Equations: Network Analysis Application (2)

Applications of Systems of Linear Equations: Network Analysis Application (2)

Applications of Systems of Linear Equations: Network Analysis Application (1)

Applications of Systems of Linear Equations: Network Analysis Application (1)

Applications of Systems of Linear Equations: Example of Network Analysis (2)

Applications of Systems of Linear Equations: Example of Network Analysis (2)

Applications of Systems of Linear Equations: Example of Network Analysis (1)

Applications of Systems of Linear Equations: Example of Network Analysis (1)

Applications of Systems of Linear Equations: Introduction to Network Analysis

Applications of Systems of Linear Equations: Introduction to Network Analysis

Applications of Systems of Linear Equations: Word-Problems involving Polynomial Curve Fitting (2)

Applications of Systems of Linear Equations: Word-Problems involving Polynomial Curve Fitting (2)

Applications of Systems of Linear Equations: Word-Problems involving Polynomial Curve Fitting (1)

Applications of Systems of Linear Equations: Word-Problems involving Polynomial Curve Fitting (1)

Applications of Systems of Linear Equations: Polynomial Curve Fitting Example

Applications of Systems of Linear Equations: Polynomial Curve Fitting Example

Applications of Systems of Linear Equations: Introduction to Polynomial Curve Fitting

Applications of Systems of Linear Equations: Introduction to Polynomial Curve Fitting

Homogeneous Systems of Linear Equations

Homogeneous Systems of Linear Equations

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (3)

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (3)

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (2)

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (2)

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (1)

Gauss-Jordan Elimination: Example of Solving a System through Gauss-Jordan Elimination (1)

Gauss-Jordan Elimination: Introduction and the Reduced Row-Echelon Form

Gauss-Jordan Elimination: Introduction and the Reduced Row-Echelon Form

Introduction to Logic Gates: Proposition and Truth Table Analogy Example

Introduction to Logic Gates: Proposition and Truth Table Analogy Example

Introduction to Logic Gates: Proposition and Truth Table Analogy

Introduction to Logic Gates: Proposition and Truth Table Analogy

Introduction to Logic Gates: Examples of Determining Output Streams

Introduction to Logic Gates: Examples of Determining Output Streams

Introduction to Logic Gates: Determining Output Streams through Propositions and Logical Connectors

Introduction to Logic Gates: Determining Output Streams through Propositions and Logical Connectors

Truth Tables as Closure Tables for Switching Networks: Constructing and Analyzing Closure Tables

Truth Tables as Closure Tables for Switching Networks: Constructing and Analyzing Closure Tables

Truth Tables as Closure Tables for Switching Networks: Constructing and Analyzing a Closure Table

Truth Tables as Closure Tables for Switching Networks: Constructing and Analyzing a Closure Table

Truth Tables as Closure Tables for Switching Networks: Introduction

Truth Tables as Closure Tables for Switching Networks: Introduction

Propositions as Analogies for Switching Networks: Drawing Switching Networks

Propositions as Analogies for Switching Networks: Drawing Switching Networks

Propositions as Analogies for Switching Networks: Representing Switching Networks as Propositions

Propositions as Analogies for Switching Networks: Representing Switching Networks as Propositions

Propositions as Analogies for Switching Networks: Introduction to Switching Networks

Propositions as Analogies for Switching Networks: Introduction to Switching Networks

Introduction to Matrices: Gaussian Elimination with Back-Substitution (3)

Introduction to Matrices: Gaussian Elimination with Back-Substitution (3)

Introduction to Matrices: Gaussian Elimination with Back-Substitution (2)

Introduction to Matrices: Gaussian Elimination with Back-Substitution (2)

Introduction to Matrices: Gaussian Elimination with Back-Substitution (1)

Introduction to Matrices: Gaussian Elimination with Back-Substitution (1)

Introduction to Matrices: Row-Echelon and Reduced Row-Echelon Form; Gaussian Elimination (Intro)

Introduction to Matrices: Row-Echelon and Reduced Row-Echelon Form; Gaussian Elimination (Intro)

Introduction to Matrices: Elementary Row Operations

Introduction to Matrices: Elementary Row Operations

Introduction to Matrices: Definition of a Matrix; Augmented and Coefficient Matrices

Introduction to Matrices: Definition of a Matrix; Augmented and Coefficient Matrices

Introduction to Systems of Linear Equations: Gaussian Elimination (2)

Introduction to Systems of Linear Equations: Gaussian Elimination (2)

Introduction to Systems of Linear Equations: Gaussian Elimination (1)

Introduction to Systems of Linear Equations: Gaussian Elimination (1)

Introduction to Systems of Linear Equations: Number of Solutions and Back-Substitution

Introduction to Systems of Linear Equations: Number of Solutions and Back-Substitution

Introduction to Systems of Linear Equations: Definition of a System of Linear Equations

Introduction to Systems of Linear Equations: Definition of a System of Linear Equations

Introduction to Systems of Linear Equations: Parametric Representation of a Solution Set

Introduction to Systems of Linear Equations: Parametric Representation of a Solution Set

Introduction to Systems of Linear Equations: Definition of a Linear Equation in n Variables

Introduction to Systems of Linear Equations: Definition of a Linear Equation in n Variables

Truth Tables as Proof of Equivalent Statements (2), Tautologies, Contradictions, and Contingencies

Truth Tables as Proof of Equivalent Statements (2), Tautologies, Contradictions, and Contingencies

Truth Tables as Proof for Equivalent Statements (1)

Truth Tables as Proof for Equivalent Statements (1)

Constructing Truth Tables (with 3 variables and an alternative method) (3)

Constructing Truth Tables (with 3 variables and an alternative method) (3)

Constructing Truth Tables (Traditional Method) (2)

Constructing Truth Tables (Traditional Method) (2)

Constructing Truth Tables (Traditional Method) (1)

Constructing Truth Tables (Traditional Method) (1)

Propositional Forms Part 2: Different Forms of Conditional Statement and Biconditional Statement

Propositional Forms Part 2: Different Forms of Conditional Statement and Biconditional Statement

Propositional Forms Part 1: Negation, Conjunction, Disjunction, and Conditional Statement

Propositional Forms Part 1: Negation, Conjunction, Disjunction, and Conditional Statement

Introduction to Logic and Propositions

Introduction to Logic and Propositions

Full simple linear regression analysis (with hypothesis testing) using Microsoft Excel 2013 (2)

Full simple linear regression analysis (with hypothesis testing) using Microsoft Excel 2013 (2)

Full simple linear regression analysis (with hypothesis testing) using Microsoft Excel 2013 (1)

Full simple linear regression analysis (with hypothesis testing) using Microsoft Excel 2013 (1)

Hypothesis Testing on Simple Linear Regression using Microsoft Excel 2013 (1)

Hypothesis Testing on Simple Linear Regression using Microsoft Excel 2013 (1)

Hypothesis Testing on Simple Linear Regression using Microsoft Excel 2013 (2)

Hypothesis Testing on Simple Linear Regression using Microsoft Excel 2013 (2)

Coefficients of Correlation and Determination in Microsoft Excel 2013 (2)

Coefficients of Correlation and Determination in Microsoft Excel 2013 (2)

The Regression Line and Regression Equation in Microsoft Excel 2013 (2)

The Regression Line and Regression Equation in Microsoft Excel 2013 (2)

Coefficients of Correlation and Determination in Microsoft Excel 2013 (1)

Coefficients of Correlation and Determination in Microsoft Excel 2013 (1)

The Regression Line and Regression Equation in Microsoft Excel 2013 (1)

The Regression Line and Regression Equation in Microsoft Excel 2013 (1)

The Scatterplot for Simple Linear Regression in Microsoft Excel 2013

The Scatterplot for Simple Linear Regression in Microsoft Excel 2013

Introduction to Simple Linear Regression (Concepts)

Introduction to Simple Linear Regression (Concepts)

Example of Analysis of Variance in Microsoft Excel 2013 (1)

Example of Analysis of Variance in Microsoft Excel 2013 (1)

Example of Analysis of Variance in Microsoft Excel 2013 (2)

Example of Analysis of Variance in Microsoft Excel 2013 (2)

Conducting Analysis of Variance in Microsoft Excel 2013

Conducting Analysis of Variance in Microsoft Excel 2013

Introduction to Analysis of Variance

Introduction to Analysis of Variance

Example of t-test of Dependent Means in Microsoft Excel 2013 (2)

Example of t-test of Dependent Means in Microsoft Excel 2013 (2)

Example of t-test of Dependent Means in Microsoft Excel 2013 (1)

Example of t-test of Dependent Means in Microsoft Excel 2013 (1)

Conducting t-test of Dependent Means in Microsoft Excel 2013

Conducting t-test of Dependent Means in Microsoft Excel 2013

Introduction to t-test of Dependent Means

Introduction to t-test of Dependent Means

Example of t-test of Independent Means in Microsoft Excel 2015 (2)

Example of t-test of Independent Means in Microsoft Excel 2015 (2)

Example of t-test of Independent Means in Microsoft Excel 2015 (1)

Example of t-test of Independent Means in Microsoft Excel 2015 (1)

Conducting t-test of Independent Means in Microsoft Excel Part 2: The Main Hypothesis Test

Conducting t-test of Independent Means in Microsoft Excel Part 2: The Main Hypothesis Test

Conducting t-test of Independent Means in Microsoft Excel Part 1: Equal and Unequal Variances Test

Conducting t-test of Independent Means in Microsoft Excel Part 1: Equal and Unequal Variances Test

Introduction to t-test of Independent Means

Introduction to t-test of Independent Means

Application of the Normal Distribution (using Microsoft Excel) Part 5: Full Problem Example

Application of the Normal Distribution (using Microsoft Excel) Part 5: Full Problem Example

Application of the Normal Distribution (using Microsoft Excel) Part 4

Application of the Normal Distribution (using Microsoft Excel) Part 4

Application of the Normal Distribution (using Microsoft Excel) Part 3: Area to the Right

Application of the Normal Distribution (using Microsoft Excel) Part 3: Area to the Right

Application of the Normal Distribution (using Microsoft Excel) Part 2: Area in Between (2)

Application of the Normal Distribution (using Microsoft Excel) Part 2: Area in Between (2)