Chapter 2, Lesson 1: Exercise 2A Chapter 2, Lesson 1: Exercise 2B Chapter 2, Lesson 1: Exercise 7 Chapter 2, Lesson 2: Exercise 3A Chapter 2, Lesson 2: Exercise 5A Chapter 2, Lesson 2: Exercise 7AB Chapter 2, Lesson 2: Exercise 7D Chapter 2, Lesson 2: Exercise 8AB Chapter 2, Lesson 3: Exercise 6AB