webassign.net Consider the following graph. - N W 2 3 4 5 6 X 1 (a) Find the interval(s) on which f is increasing. (Enter your answer using interval notation.) (4, 6) (b) Find the interval(s) on which f is decreasing. (Enter your answer using interval notation.) (1, 3) (c) Find the open interval(s) on which f is concave upward. (Enter your answer using interval notation (d) Find the interval(s) on which f is concave downward. (Enter your answer using interval notation.) (e) Find the coordinates of the point(s) of inflection. ( x, y ) =