Use the given graph of f over the interval (0, 7) to find the following. 0 (a) The open intervals on which f is increasing. (Enter your answer using interval notation.) (0,1), (3,7) (b) The open intervals on which f is decreasing. (Enter your answer using interval notation.) (1,3) (c) The open intervals on which f is concave upward. (Enter your answer using interval notation.) (1,4), (5,7) X (d) The open intervals on which f is concave downward. (Enter your answer using interval notation. ) (0,1), (4,5) X (e) The coordinates of the points of inflection. ( x, y ) = (1,3 ) (smallest x-value) X ( x, y ) = (4,3) X ( x, y ) = (5,4) (largest x-value)