input: Write a function to find the minimum and maximum values in a list and return them as a tuple.
  assert find_min_max([1, 5, 6, 8, 7]) == (1, 8)
  assert find_min_max([10, 20, 30, 40, 50]) == (10, 50)
  assert find_min_max([-1, -5, -3, -4, -2]) == (-5, -1)
output: def find_min_max(lst):
      return (min(lst), max(lst))