Haskell Programming

DEFINING FUNCTIONS: Implement and test the following THREE functions: Modify the definition of the function qsort function introduced in the textbook so that it produces a reverse sorted version of a list? Provide explanations for your answer in the documentation file. In terms of the other library functions, define two definitions of the library function last to elects the last element of a non-empty list; for example, last [1,2,3,4,5) = 5. Provide explanations for your answers in the documentation file. . In terms of the other library functions, define two definitions of the library function init that removes the last element from a non-empty list; for example, init [1,2,3,4,5) = [1,2,3,4]. Provide explanations for your answers in the documentation file