se the given graph of the derivative f' of a continuous function f over the interval (0, 9) to find the following. y y=f'(x) -2 0 2 4 8 x (a) On what interval(s) is fincreasing? (Enter your answer using interval notation.) On what interval(s) is f decreasing? (Enter your answer using 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 using interval notation.) On what interval(s) is f concave downward? (Enter your answer using interval notation.) (d) What are the x-coordinate(s) of the inflection point(s) of f? (Enter your answers as a comma-separated list.) x =