We are interested in a function f, but the only graph we have is of its derivative, 1", given in the following figure. Graph ofy = f'(:c) Which of the following statements about f are true? (1) f is increasing on the intervals (700, *6) U (0,6) (2) f is decreasing on the intervals (700, *6) U (0,6) (3) f is concave up on the interval (72 , 2 J3) (4) f is concave down on the interval (72 V12 ) (5) The critical points of f are a: = *6, m = 0 and :1: = 6 (6) The inflection points of f are a: = 76, a: = O and r1: = 6 O (1),(3),(5) (2),(3),(5) O (2)45) ._. I.\\ y.\