1.1 problem 1(a)
  1.2 problem 1(b)
  1.3 problem 1(c)
  1.4 problem 1(d)
  1.5 problem 1(e)
  1.6 problem 1(f)
  1.7 problem 1(g)
  1.8 problem 1(h)
  1.9 problem 1(i)
  1.10 problem 1(j)
  1.11 problem 2(a)
  1.12 problem 2(b)
  1.13 problem 2(c)
  1.14 problem 2(d)
  1.15 problem 2(e)
  1.16 problem 2(f)
  1.17 problem 2(g)
  1.18 problem 2(h)
  1.19 problem 2(i)
  1.20 problem 2(j)
  1.21 problem 2(k)
  1.22 problem 2(L)
  1.23 problem 2(m)
  1.24 problem 2(n)
  1.25 problem 2(o)
  1.26 problem 2(p)
  1.27 problem 2(q)