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)