0 points: Chapter 0, section 6: Exercise 41

2 points: Chapter 0, section 6: Exercise 43

0 points: Chapter 0, section 6: Exercise 49

2 points: Chapter 0, section 6: Exercise 50

0 points: Chapter 0, section 6: Exercise 51 or Exercise 55

0 points: Chapter 0, section 7: Exercise 11

2 points: Chapter 0, section 7: Exercise 12

0 points: Chapter 0, section 7: Exercise 20

2 points: Chapter 0, section 7: Exercise 21

0 points: Chapter 0, section 7: Exercise 24

0 points: Chapter 0, section 7: Exercise 26. This one is long. Be very careful, give yourself lots of space, and don't give up!

2 points: Chapter 0, section 7: Exercise 27 or Exercise 28