input: Write a function to sort a list of numbers in ascending order.
  assert sort_numbers([4, 2, 7, 1, 9]) == [1, 2, 4, 7, 9]
  assert sort_numbers([10, 5, 3, 8]) == [3, 5, 8, 10]
  assert sort_numbers([1, 2, 3, 4, 5]) == [1, 2, 3, 4, 5]
output: def sort_numbers(numbers):
      return sorted(numbers)