4. Below is the graph of f'(x) , not f(x). (a) State the intervals on which f (x) is increasing and decreasing & determine the x-values for which f (x) has a local max or min. (b) State the intervals on which f (x) is concave up and concave down & determine the x-values for which f (x) has an inflection point. (c) Next to f'(x) , draw the graph of f(x) assuming that f (0) =0 and f(x) is continuous