CS代考 ;; The first three lines of this file were inserted by DrRacket. They recor

;; The first three lines of this file were inserted by DrRacket. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib “htdp-beginner-reader.ss” “lang”)((modname a02interface) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
;; Question 1

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(define (double-string? str)

;; Question 2
(define (tour-total num-people tour-type)

;; Question 3
(define (bit-error? bin-num parity)

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