Instead, write the function `declist`
that decrements each element of a list by a given amount. The type of the function is
$[Integer] \to Integer \to [Integer]$.
Notice the restrictions on this function at the beginning of the exercises. Try your function out
on
`declist` $[63, 19, 4, 0, 82, 14] \ 7$
Turn in a listing of the function and the results of the test run.