;; Scheme ;;

(define (over-or-under x y)
  'YOUR-CODE-HERE
)

;;; Tests
(over-or-under 1 2)
; expect -1
(over-or-under 2 1)
; expect 1
(over-or-under 1 1)
; expect 0

(define (filter-lst f lst)
  'YOUR-CODE-HERE
)

;;; Tests
(define (even? x)
  (= (modulo x 2) 0))
(filter-lst even? '(0 1 1 2 3 5 8))
; expect (0 2 8)

(define (make-adder num)
  'YOUR-CODE-HERE
)

;;; Tests
(define adder (make-adder 5))
(adder 8)
; expect 13