Fill out todos. Language racket

#lang racket (provide append-string shortest-distance) ; takes two "strings", and appends the larger string to the smaller string ; if they are the same size, keep the original order (str1, str2) (define (append-string str1 str2) 'todo)

; compute the shortest distance between three different points ; each pt# is a pair of values, (cons x y), of its position (define (shortest-distance pt1 pt2 pt3) 'todo)