input: from typing import List
  
  def min_max(numbers: List[int]) -> List[int]:
      """ Given an array of numbers, return an array with the greatest and smallest values.
      >>> min_max([3, 4, 2, 8, 15, 6])
      [2, 15]
      """
      return [min(numbers), max(numbers)]
output:     return [min(numbers), max(numbers)]