Exercises for 17.09

From Chapter 2:

Ex. 2.19, 2.20, 2.21, 2.22, 2.23, 2.25, 2.26, 2.27, 2.28, 2.29, 2.30, 2.34, 2.35

From Chapter 7:

7.8, 7.9, 7.10, 7.11, 7.12, 7.13 + an exercise a