Use the given graph of f over the interval (0, 7) to find the following.

(a) The open intervals on which f is increasing. (Enter your answer using interval notation.)

(b) The open intervals on which f is decreasing. (Enter your answer using interval notation.)

(c) The open intervals on which f is concave upward. (Enter your answer using interval notation.)

(d) The open intervals on which f is concave downward. (Enter your answer using interval notation.)

(e) The coordinates of the points of inflection.

(x, y)	=	(smallest x-value)
(x, y)	=
(x, y)	=	(largest x-value)