input: Write a python function to compute the average of a list of numbers.
  assert compute_average([1, 3, 5, 7, 9]) == 5.0
  assert compute_average([10, 20, 30, 40, 50]) == 30.0
  assert compute_average([2, 4, 6, 8, 10]) == 6.0
output: def compute_average(numbers):
      return sum(numbers) / len(numbers)