input: Write a Python function that eliminates duplicate elements from a given tuple.
  assert unique_elements((1, 3, 5, 2, 3, 5, 1, 1, 3)) == (1, 2, 3, 5)
  assert unique_elements((2, 3, 4, 4, 5, 6, 6, 7, 8, 8)) == (2, 3, 4, 5, 6, 7, 8)
  assert unique_elements((11, 12, 13, 11, 11, 12, 14, 13)) == (11, 12, 13, 14)
output: def unique_elements(t):
      return tuple(sorted(set(t)))