input: Write a python function to sort a list of numbers in ascending order.
  assert sort_ascending([5, 3, 7, 2, 9]) == [2, 3, 5, 7, 9]
  assert sort_ascending([10, 1, 12, 4, 8]) == [1, 4, 8, 10, 12]
  assert sort_ascending([3, 3, 3, 3, 3]) == [3, 3, 3, 3, 3]
output: def sort_ascending(numbers):
      return sorted(numbers)