Chapter 1, Lesson 1: Exercise 2D Chapter 1, Lesson 1: Exercise 5A Chapter 1, Lesson 1: Exercise 5B Chapter 1, Lesson 1: Exercise 6AB Chapter 1, Lesson 1: Exercise 6C Chapter 1, Lesson 1: Exercise 10B Chapter 1, Lesson 1: Exercise 11A Chapter 1, Lesson 1: Exercise 13AB Chapter 1, Lesson 2: Exercise 4AB Chapter 1, Lesson 2: Exercise 5A Chapter 1, Lesson 2: Exercise 8A Chapter 1, Lesson 2: Exercise 8B Chapter 1, Lesson 3: Exercise 2A Chapter 1, Lesson 3: Exercise 4A Chapter 1, Lesson 3: Exercise 9A Chapter 1, Lesson 3: Exercise 12A