Exercises 5.2

17, 19*, 23, 29

Exercises 5.3

13*, 17*, 29*, 37*, 53, 65, 69

Exercises 5.4

3, 7, 17*, 31*, 37*

Exercises 5.5

5, 12, 19*, 27*, 31, 59*, 63, 69*, 91

Exercises 6.1

13, 19*, 23*, 25*, 27, 35*, 57, 59