See below links to pdf files (which open in seperate windows) of my proofs to each of the 20 exercises of Chapter 1
| Exercise 1 |
| Exercise 2 |
| Exercise 3 |
| Exercise 4 |
| Exercise 5 |
| Exercise 6 |
| Exercise 7 |
| Exercise 8 |
| Exercise 9 |
| Exercise 10 |
| Exercise 11 |
| Exercise 12 |
| Exercise 13 |
| Exercise 2 |
| Exercise 3 |