The graph of the derivative f' of a continuous function f is shown. (Assume f' continues to o.) y 4 y= f'(x) 2 2 6 -2 (a) On what interval(s) is f increasing? (Enter your answer in interval notation.) On what interval(s) is f decreasing? (Enter your answer in interval notation.) (b) At what value(s) of x does f have a local maximum? (Enter your answers as a comma-separated list.) X = At what value(s) of x does f have a local minimum? (Enter your answers as a comma-separated list.) X = (c) On what interval(s) is f concave upward? (Enter your answer in interval notation.) On what interval(s) is f concave downward? (Enter your answer in interval notation.) (d) State the x-coordinate(s) of the point(s) of inflection. (Enter your answers as a comma-separated list.) X =

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