1. Exercise 4, page 527.
2. Exercise 6, page 527-528.
3. Exercise 26, page 528.
4. Exercise 8, page 536.
5. Exercise 28, page 537.
6. Exercise 4, page 542-543.
7. Exercise 8, page 543.
8. Exercise 14, page 543.
9. Exercise 18, page 543.
10. Exercise 32, page 544.