15.1 problem 22.1 (a)
15.2 problem 22.1 (b)
15.3 problem 22.1 (c)
15.4 problem 22.1 (d)
15.5 problem 22.2
15.6 problem 22.3 (a)
15.7 problem 22.3 (b)
15.8 problem 22.3 (c)
15.9 problem 22.3 (d)
15.10 problem 22.4
15.11 problem 22.5 (a)
15.12 problem 22.5 (b)
15.13 problem 22.5 (c)
15.14 problem 22.5 (d)
15.15 problem 22.6
15.16 problem 22.7 (a)
15.17 problem 22.7 (b)
15.18 problem 22.7 (c)
15.19 problem 22.7 (d)
15.20 problem 22.7 (e)
15.21 problem 22.7 (f)
15.22 problem 22.8
15.23 problem 22.9 (a)
15.24 problem 22.9 (b)
15.25 problem 22.9 (c)
15.26 problem 22.9 (d)
15.27 problem 22.9 (e)
15.28 problem 22.10 (a)
15.29 problem 22.10 (b)
15.30 problem 22.10 (c)
15.31 problem 22.10 (d)
15.32 problem 22.10 (e)
15.33 problem 22.10 (f)
15.34 problem 22.10 (g)
15.35 problem 22.10 (h)
15.36 problem 22.10 (i)
15.37 problem 22.10 (j)
15.38 problem 22.10 (k)
15.39 problem 22.10 (L)
15.40 problem 22.10 (m)
15.41 problem 22.10 (n)
15.42 problem 22.11 (a)
15.43 problem 22.11 (b)
15.44 problem 22.11 (c)
15.45 problem 22.11 (d)
15.46 problem 22.11 (e)
15.47 problem 22.11 (f)
15.48 problem 22.11 (g)
15.49 problem 22.11 (h)
15.50 problem 22.11 (i)
15.51 problem 22.11 (j)
15.52 problem 22.11 (k)
15.53 problem 22.11 (L)
15.54 problem 22.11 (m)
15.55 problem 22.11 (n)
15.56 problem 22.12 (a)
15.57 problem 22.12 (b)
15.58 problem 22.12 (c)
15.59 problem 22.12 (d)
15.60 problem 22.12 (e)
15.61 problem 22.12 (f)
15.62 problem 22.12 (g)
15.63 problem 22.13 (a)
15.64 problem 22.13 (b)
15.65 problem 22.13 (c)
15.66 problem 22.13 (d)
15.67 problem 22.13 (e)
15.68 problem 22.13 (f)
15.69 problem 22.13 (g)
15.70 problem 22.14 (a)
15.71 problem 22.14 (b)
15.72 problem 22.14 (c)
15.73 problem 22.14 (d)
15.74 problem 22.15 (a)
15.75 problem 22.15 (b)
15.76 problem 22.15 (c)
15.77 problem 22.15 (d)
15.78 problem 22.15 (e)
15.79 problem 22.15 (f)
15.80 problem 22.15 (g)
15.81 problem 22.15 (h)