Answers
1.
3.
5.
7.
9.
11.
13. (a) (b)
15. (a) (b)
17. (a) (b)
19.
21.
23.
25.
27.
29.
31.
33.
35.
37. (i) (ii) (iii) (iv)
39. (i) (ii) (iii) (iv)
41. (i) (ii) (iii) (iv)
43.
45.
(a)
(b)
47. a. (i) and (ii) See the graph
(iii)
(iv)
49.
(a)
(b)
(c) so
51.
(a)
(b)
(c) so
53. (a) (b)
55.
57. (a) (b)
59.
61.