2. (2 points each) Consider the following two variable bindings in Lisp:

(setq x (a b c d))

(setq y (1 2 3 4))

Using only the variables x and y and the functions car, cdr and cons, provide Lisp S- expressions for generating the following:

a) (d c b a)

b) (4 c (b 2))

c) ((a b c d) . 1)

d) (((a c) (1 2)) . a)

e) ((a 1) (b 2) (c 3) (d 4))