input: Write a python function to find the maximum and minimum values in a list.
  assert find_max_min([1, 2, 3, 4, 5]) == (5, 1)
  assert find_max_min([10, 20, 30, 40, 50]) == (50, 10)
  assert find_max_min([5, -1, 12, 0, -7, 3]) == (12, -7)
output: def find_max_min(lst):
      return (max(lst), min(lst))