#lang racket
; Returns the result of raising base to the (non-negative) power exp.
(define (pow  base exp)
  (if (< exp 1)
      1
      (* base (pow base (- exp 1)))))
  
  
; Returns n!.
(define (factorial n) 0)

  
  
  
    
  
  
; Returns the nth number in the Fibonacci series.
(define (fib n) 0)

  
    
  
  
  
  
; Returns #t if n is prime and #f otherwise.
; The first function shown is a helper function.
(define (prime?-help n i) #f)

  
  
  
  
  
  
  
  
(define (prime? n) (prime?-help n 2))