a. Find the open intervals on which the function is increasing and those on which it is decreasing b. Identify the function's local extreme values, if any, saying where they occur. f(x) = x1]3 (x2 - 9) a. On what open intervals, if any, is the function increasing? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (3) A. The function is increasing on the open interval(s) (Simplify your answer. Type your answer in interval notation. Type an exact answer, using radicals as needed Use a comma to separate answers as needed) C) B. The function is never increasing