The language is Scheme programming

Returns the set (i.e., list with no duplicates) of order numbers that were placed on a given date.

(define (getOrdersPlacedOn date sales)

; TODO: Fill this in

0 ; stub -- modify it accordingly

)

Input example:

(1154 ("2/14/2012" "2/16/2012") (4462.23 0.04 440.72 100.98) ("Delivery Truck" "Nunavut") "Hon 4-Shelf Metal Bookcases")

Output example:

(293)

(26756)

(293 22980 20579 929 6150)

(5121 26756 7106 43493)