@ -35,7 +35,7 @@ For part 2, This works:
(defun average (li)
(/ (-sum li) (length li)))
(let ((number-lists (--map (-running-sum (append (list it) data))
(let ((number-lists (--map (-running-sum (cons it data))
(list 50.5 49.5))))
(average (--map
(-sum (--map (abs (- (car it) (cdr it)))