This is the set of (unordered) class marks in an end of session maths test.
47, 54, 43, 50, 61, 36, 65, 54, 50, 43, 62, 59, 36, 45, 45, 33, 53, 67, 21, 45, 50, 36, 58
Calculate the mode, mean and median of class marks.