Need someone good expert in racket programing

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-intermediate-reader.ss" "lang")((modname hw7-problem1) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f () #f))) (require 2htdp/image)  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; Problem 1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;  ; This problem asks you to design several functions that employ the ; following data definitions. The functions that you design *must* use ; list abstraction(s) when appropriate; you MAY NOT use recursion: doing ; so will lead you to get no code credit for the function :( ; ; NOTE #1: Part of the credit for each problem will be based on the choice ; of list abstractions, so make sure that they are a good match for the ; problem. ; ; NOTE #2: For certain problems, you will have to design helper functions ; that do not use list abstractions. You should follow the full design ; recipe (including appropriate use of templates) for all problems. Be sure ; to do this, even if it feels a bit tedious - listen to your templates!! ; ; Data Definitions (do not modify these)   ; A Weekday is one of: ; - "Monday" ; - "Tuesday" ; - "Wednesday" ; - "Thursday" ; - "Friday" ; Interpretation: a day that excludes the weekend  (define WEEKDAY-M "Monday") (define WEEKDAY-T "Tuesday") (define WEEKDAY-W "Wednesday") (define WEEKDAY-R "Thursday") (define WEEKDAY-F "Friday")  (define (weekday-temp w)   (...    (cond      [(string=? w WEEKDAY-M) ...]      [(string=? w WEEKDAY-T) ...]      [(string=? w WEEKDAY-W) ...]      [(string=? w WEEKDAY-R) ...]