8.1 problem 1
8.2 problem 2
8.3 problem 3 (a)
8.4 problem 3 (b)
8.5 problem 4 (a)
8.6 problem 4 (b)
8.7 problem 4 (c)
8.8 problem 5 (a)
8.9 problem 5 (b)
8.10 problem 5 (c)
8.11 problem 6 (a)
8.12 problem 6 (b)
8.13 problem 6 (c)
8.14 problem 7 (a)
8.15 problem 7 (b)
8.16 problem 7 (c)
8.17 problem 7 (d)
8.18 problem 8 (a)
8.19 problem 8 (b)
8.20 problem 8 (c)
8.21 problem 8 (d)
8.22 problem 9 (a)
8.23 problem 9 (b)
8.24 problem 9 (c)
8.25 problem 9 (d)
8.26 problem 9 (e)
8.27 problem 10 (a)
8.28 problem 10 (b)
8.29 problem 10 (c)
8.30 problem 11 (a)
8.31 problem 11 (b)
8.32 problem 11 (c)
8.33 problem 11 (d)
8.34 problem 12 (a)
8.35 problem 12 (b)
8.36 problem 12 (c)
8.37 problem 13 (a)
8.38 problem 13 (b)
8.39 problem 13 (c)
8.40 problem 13 (d)
8.41 problem 14 (a)
8.42 problem 14 (b)
8.43 problem 14 (c)
8.44 problem 14 (d)
8.45 problem 14 (e)