Don't understand

Below is the graph of a function f and three statements (I, II, III). Which of the statements must be true? (4, 9) (2,3) A I. f' ( 2 ) > 3 II. f'(4) > 3 III. f' ( 4) > f' (2) (a) I and II only; (b) I and III only; (c) II and III only; (d) I, II, and III; (e) The correct answer is not given by (a), (b), (c), or (d)