Using dr racket...

While quick-sort< quickly reduces the size of the problem in many cases, it is inappropriately slow for small problems. Hence people use quick-sort< to reduce the size of the problem and switch to a different sort function when the list is small enough.

Develop a version of quick-sort< that uses sort< (an appropriately adapted variant of sort> from Auxiliary Functions that Recur) if the length of the input is below some threshold.