We are interested in a function f, but the only graph we have is of its derivative, fl, given in the following figure. 30 -10 10 Which of the following statements about f are true? (1) f is increasing on the intervals (00, 4) U (0,4) (2) f is decreasing on the intervals (00, 4) U (0,4) (3) f is concave up on the interval (4/3 , 4/3 JET) (4} f is concave down on the interval (4/3 J3, 4/3 V3) (5) The critical points of f are at: = 4, at: = 0 and at: = 4 (6) The inflection points off are m = 4, m = 0 and m = 4 -30 Graph ofy = f'(m)