| Problems 1,2 - 1 | Problems 3,4,5 - 1 |
| Problem 6 - 1, 2, 3, 4, 5, 6, 7 | Problems 8,9,10 - 1, 2, 3 |
| Problem 11 - 1 | Problem 18 - 1 |
| Problem 22 - 1, 2 |
| Problems 1,2 - 1 | Problem 3 - 1, 2, 3, 4 |
| Problem 4 - 1, 2, 3, 4 | Problem 7 - 1, 2 |
| Problem 10 - 1 |
| Problem 2 - 1, 2 | Problem 3 - 1, 2, 3, 4, 5 |
| Problem 4 - 1 |
| Problem 1 - 1, 2 | Problem 2 - 1, 2, 3 |
| Problem 1 - 1, 2 | Problem 2 - 1, 2 |
| Problem 3 - 1, 2 | Problem 4 - 1, 2, 3, 4 |
| Problem 2 - 1, 2 |
| Problem 19 - 1, 2 3, 4 | Problem 20 - 1, 2 |
| Problem 21 - 1, 2 |