Do Exercise $9\mathrm{.}13$ on p$.145$ of your text. The type of the function is $[$Bool$]->$ Integer. Notice the restrictions on this function at the beginning of the exercises. Try your function out on $($truecount $($True$,$ False, True, Falsel, truecount $[$False$,$

True, Falsel$)$

Turn in a listing of the function and the results of the test run.

Exercise $13$ Write a function truecount of type bool list$->$ int that takes a list of boolean values and returns the number of trues in the list.

write the code and show the output