input: Write a function to calculate the maximum, minimum, and mean number of elements in a given string. The function should return a tuple containing the maximum element, the minimum element, and the mean of all elements in the string.
  
  def get_stats_for_string(string):
      num_elements = len(string)
      max_element = max(string)
      min_element = min(string)
      mean_element = sum(string) / num_elements
      return (max_element, min_element, mean_element)
  
  assert get_stats_for_string("abcdef")==('f', 'a', 3.0)
  assert get_stats_for_string("xyz")==('z', 'x', 2.0)
  assert get_stats_for_string("hello")==('o', 'e', 2.8)
  assert get_stats_for_string("12345")==('5', '1', 3.0)
  assert get_stats_for_string("a")==('a', 'a', 1.0)
output: def get_stats_for_string(string):
      num_elements = len(string)
      max_element = max(string)
      min_element = min(string)
      mean_element = sum(ord(char) for char in string) / num_elements
      return (max_element, min_element, mean_element)