1. (a)
[1]
[2]
(b)
2. (a)
[1]
[1+1+1+1]
(b)
(c)
(d)
3.
(a)
[2]
(b)
(c)
[2]
[2]
(d)
[1]
4.
(a)
[1]
(b)
[1]
(c)
[3]
(d)
[2]
5.
6.
[1]
[1]