(define (cddr s) (cdr (cdr s)))

(define (cadr s) 'YOUR-CODE-HERE)

(define (caddr s) 'YOUR-CODE-HERE)

(define (ascending? lst) 'YOUR-CODE-HERE)

(define (interleave lst1 lst2) 'YOUR-CODE-HERE)

(define (my-filter func lst) 'YOUR-CODE-HERE)

(define (no-repeats lst) 'YOUR-CODE-HERE)