9.1 problem 1(a)
  9.2 problem 1(b)
  9.3 problem 1(c)
  9.4 problem 1(d)
  9.5 problem 1(e)
  9.6 problem 1(f)
  9.7 problem 1(g)
  9.8 problem 1(h)
  9.9 problem 1(i)
  9.10 problem 1(j)
  9.11 problem 1(k)
  9.12 problem 1(l)
  9.13 problem 1(m)
  9.14 problem 1(n)
  9.15 problem 1(o)
  9.16 problem 1(p)
  9.17 problem 1(q)
  9.18 problem 1(r)
  9.19 problem 2(a)
  9.20 problem 2(b)
  9.21 problem 2(c)
  9.22 problem 2(d)
  9.23 problem 2(e)
  9.24 problem 2(f)
  9.25 problem 5(a)
  9.26 problem 5(b)
  9.27 problem 5(c)
  9.28 problem 5(d)
  9.29 problem 5(e)
  9.30 problem 5(f)
  9.31 problem 5(g)
  9.32 problem 5(h)
  9.33 problem 5(i)