16 -4 -2 2 4 -16 Figure for 80 80. Graphical Reasoning The graph of the first derivative of a function f on the interval [– 4, 2] is shown. Use the graph to answer each question. (a) On what interval(s) is ƒ increasing? (b) On what interval(s) is the graph of f concave upward? (c) At what x-value(s) does ƒ have relative extrema? (d) At what x-value(s) does the graph of f have a point of inflection?

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