input: Write a function to find the maximum and minimum values in a list.
  assert findMaxMin([-1, 6, 4, -2, 3]) == (6, -2)
  assert findMaxMin([10, 20, 30, 40, 50]) == (50, 10)
  assert findMaxMin([-10, -20, -30, -40, -50]) == (-10, -50)
  assert findMaxMin([0, 0, 0, 0, 0]) == (0, 0)
output: def findMaxMin(lst):
      return (max(lst), min(lst))