7.2 14, 20

7.3 4, 13

7.4 19

7.5 7

7.6 17

7.7 3

10.2 9, 19

10.3 16, 21, 22

10.4 4, 14

10.6 9, 10, 15

10.7 4, 5, 21, 24

10.8 4, 8, 10

9.2 43, 46, 50, 51

9.3 12, 20, 32

9.4 just sketch 5 and 9, complete 17a and 18a

9.5 3, 12