6 Problem 1.2-1, page 12

6.1 problem 1.2-1 (a)
6.2 problem 1.2-1 (b)
6.3 problem 1.2-1 (c)
6.4 problem 1.2-1 (d)
6.5 problem 1.2-1 (e)
6.6 problem 1.2-1 (f)
6.7 problem 1.2-1 (g)
6.8 problem 1.2-1 (h)
6.9 problem 1.2-1 (i)