Use Dr. Racket: Beginning Student Language

Design a function that will consume a list of positive whole numbers and produce a stack of solid black squares, where the size of each square corresponds to a number in the list. The squares should be stacked bottom to top with square size corresponding to first to last element in the list. For example: given the list with values 20 40, 10 the result should be and image with 3 squares, each above the previous You must include any necessary data definitions. You can use any data definitions you have designed previously in this file