3.4 Lisp and Higher-Order Functions Lisp functions compose, mapcar, and maplist are defined as follows, with #t written for true and () for the empty list. Text beginning with;; and continuing to the end of a line is a comment. (define compose (lambda (f g) (lambda (x) (f (g x))) (define mapcar (lambda (f xs) (cond (eq? xs 0)O) If the list is empty, return the empty list ( : Otherwise, apply f to the first element. . (cons (f (car xs)) :: and map fon the rest of the list (mapcar f (cdrxs)) 3.4 Lisp and Higher-Order Functions Lisp functions compose, mapcar, and maplist are defined as follows, with #t written for true and () for the empty list. Text beginning with;; and continuing to the end of a line is a comment. (define compose (lambda (f g) (lambda (x) (f (g x))) (define mapcar (lambda (f xs) (cond (eq? xs 0)O) If the list is empty, return the empty list ( : Otherwise, apply f to the first element. . (cons (f (car xs)) :: and map fon the rest of the list (mapcar f (cdrxs))