0 points: Chapter 3, section 1: Exercise 4

0 points: Chapter 3, section 1: Exercise 5

2 points: Chapter 3, section 1: Exercise 6

0 points: Chapter 3, section 1: Exercise 7

2 points: Chapter 3, section 1: Exercise 8

0 points: Chapter 3, section 1: Exercise 11

2 points: Chapter 3, section 1: Exercise 12

0 points: Chapter 3, section 1: Exercise 14

2 points: Chapter 3, section 1: Exercise 15

0 points: Chapter 3, section 1: Exercise 18

2 points: Chapter 3, section 1: Exercise 17 or 19