input: Write a Python function that returns the longest list among a list of lists and its length.
  assert get_max_length_list([[0], [1, 3], [5, 7], [9, 11], [13, 15, 17]]) == (3, [13, 15, 17])
  assert get_max_length_list([[1], [5, 7], [10, 12, 14, 15]]) == (4, [10, 12, 14, 15])
  assert get_max_length_list([[5], [15, 20, 25]]) == (3, [15, 20, 25])
output: def get_max_length_list(list_of_lists):
      max_list = max(list_of_lists, key=len)
      return len(max_list), max_list