Chapter 3, Lesson 1: Exercise 2A Chapter 3, Lesson 1: Exercise 4A Chapter 3, Lesson 1: Exercise 4B Chapter 3, Lesson 1: Exercise 9A Chapter 3, Lesson 2: Exercise 2A Chapter 3, Lesson 2: Exercise 2B Chapter 3, Lesson 2: Exercise 4A Chapter 3, Lesson 2: Exercise 5AB Chapter 3, Lesson 3: Exercise 2AB Chapter 3, Lesson 3: Exercise 3A-1 Chapter 3, Lesson 3: Exercise 3A-2 Chapter 3, Lesson 3: Exercise 8A Chapter 3, Lesson 3: Exercise 9A Chapter 3, Lesson 3: Exercise 10A