Problem 9. (15 points) Suppose that f (a) = 24 - 5x3. (A) List all the critical values of f (x). Note: If there are no critical values, enter 'NONE'. (B) Use interval notation to indicate where f (x) is increasing. Note: Use 'INF' for co, '-INF' for -co, and use 'U' for the union symbol. Increasing: (C) Use interval notation to indicate where f(x) is decreasing. Decreasing: (D) List the x values of all local maxima of f (). If there are no local maxima, enter 'NONE'. x values of local maximums = (E) List the x values of all local minima of f (x). If there are no local minima, enter 'NONE'. x values of local minimums = Note: You can earn partial credit on this