Assignment 1 solutions

(a) See Appendix C.

(b) Function definitions:

    [i] (defun half (x)
	  (/ x 2))

   [ii] (defun half (x)      OR
	  (* 0.5 x))

	(defun half (x)      
	  (* x 0.5))

 [iii]  (defun multi-digit-p (x)
          (> x 9))