input: Write a python function to divide elements of a list by a given divisor.
  assert divide_list([10, 20, 30, 40], 10)==[1.0, 2.0, 3.0, 4.0]
  assert divide_list([50, 60, 70, 80], 5)==[10.0, 12.0, 14.0, 16.0]
  assert divide_list([25, 35, 45, 55], 5)==[5.0, 7.0, 9.0, 11.0]
output: def divide_list(lst, divisor):
      return [x / divisor for x in lst]