input: Write a python function to generate a list of numbers starting from 1 to 100 with a step of 5.
  assert generate_numbers() == [1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81, 86, 91, 96]
  assert generate_numbers()[0] == 1
  assert generate_numbers()[-1] == 96
output: def generate_numbers():
      return list(range(1, 101, 5))