input: Write a function to sort the list items in descending order and return the sorted list. If the given list is empty, return the empty list.
  
  assert sort_descending([3, 7, 5, 8, 10])==[10, 8, 7, 5, 3]
  assert sort_descending([1, 2, 3, 4, 5])==[5, 4, 3, 2, 1]
  assert sort_descending([])==[]
  assert sort_descending([1])==[1]
  assert sort_descending([9, 4, 3, 2, 5, 8, 1])==[9, 8, 5, 4, 3, 2, 1]
output: def sort_descending(lst):
      return sorted(lst, reverse=True)