*** Language: Haskell ***

Write a function sumLastPart which, only using list library functions (no list comprehension), returns the sum of the last n numbers in the list, where n is the first argument to the function. (Assume that there are always at least n numbers in the list. For this problem and the others, assume that no error checking is necessary unless otherwise specified. But feel free to incorporate error checking into your definition.) sumLastPart :: Int -> [Int] -> Int