Please solve the "x" ones

The graph of the first derivative f' of a function f is shown. (Assume the function is defined only for 0 s x s 9.) y = f(x) (a) On what interval(s) is f increasing? (Enter your answer using interval notation.) (0,4), (6,8) (b) At what value(s) of x does f have a local maximum? (Enter your answers as a comma-separated list.) X = 4,8 At what value(s) of x does f have a local minimum? (Enter your answers as a comma-separated list.) X 6 (c) On what interval(s) is f concave upward? (Enter your answer using interval notation.) (0,1), (2,3), (5,7) On what interval(s) is f concave downward? (Enter your answer using interval notation. ) (1,2), (3,5), (7,00 ) X (d) What are the x-coordinate(s) of the inflection point of f? (Enter your answers as a comma-separated list.) X = 1,3,5,7 XConsider the equation below. (If an answer does not exist, enter DNE.) f ( x ) = - X x2 + 9 (a) Find the interval on which f is increasing. (Enter your answer using interval notation.) (-3,3) Find the interval on which f is decreasing. (Enter your answer using interval notation.) (-00, - 3), (3,00) (b) Find the local maximum and minimum values of f. local minimum value local maximum value (c) Find the inflection points. (Order your answers from smallest to largest x, then from smallest to largest y.) ( x, y ) = 0, 0 X ( x, y ) = -3V3 - V3 12 X ( x, y ) = 3V3 V3 12 Find the interval on which f is concave up. (Enter your answer using interval notation.) (-3V3,0), (3V3,00) Find the interval on which f is concave down. (Enter your answer using interval notation.) (-00, - 3V3 ), (0, 3V3)