3.1 problem 4.3 (a)
3.2 problem 4.3 (b)
3.3 problem 4.3 (c)
3.4 problem 4.3 (d)
3.5 problem 4.3 (e)
3.6 problem 4.3 (f)
3.7 problem 4.3 (g)
3.8 problem 4.3 (h)
3.9 problem 4.3 (i)
3.10 problem 4.3 (j)
3.11 problem 4.4 (a)
3.12 problem 4.4 (b)
3.13 problem 4.4 (c)
3.14 problem 4.4 (d)
3.15 problem 4.4 (e)
3.16 problem 4.4 (f)
3.17 problem 4.5 (a)
3.18 problem 4.5 (b)
3.19 problem 4.5 (c)
3.20 problem 4.5 (d)
3.21 problem 4.6 (a)
3.22 problem 4.6 (b)
3.23 problem 4.6 (c)
3.24 problem 4.6 (d)
3.25 problem 4.6 (e)
3.26 problem 4.6 (f)
3.27 problem 4.7 (a)
3.28 problem 4.7 (b)
3.29 problem 4.7 (c)
3.30 problem 4.7 (d)
3.31 problem 4.7 (e)
3.32 problem 4.7 (f)
3.33 problem 4.7 (g)
3.34 problem 4.7 (h)
3.35 problem 4.7 (i)
3.36 problem 4.7 (j)
3.37 problem 4.7 (k)
3.38 problem 4.7 (L)
3.39 problem 4.7 (m)
3.40 problem 4.7 (n)
3.41 problem 4.7 (o)
3.42 problem 4.8 (a)
3.43 problem 4.8 (b)
3.44 problem 4.8 (c)
3.45 problem 4.8 (d)
3.46 problem 4.8 (e)
3.47 problem 4.8 (f)
3.48 problem 4.8 (g)