input: Write a python function to calculate the sum and average of a list of numbers.
  assert calc_sum_average([1, 2, 3, 4, 5]) == {'sum': 15, 'average': 3.0}
  assert calc_sum_average([10, 20, 30, 40, 50]) == {'sum': 150, 'average': 30.0}
  assert calc_sum_average([5, 5, 5, 5, 5]) == {'sum': 25, 'average': 5.0}
output: def calc_sum_average(numbers):
      total = sum(numbers)
      average = total / len(numbers)
      return {'sum': total, 'average': average}