Answer the following questions about the function whose derivative is f'(x) = 2x(x -5) a. What are the critical points of ? b. On what open intervals is f increasing or decreasing? c. At what points, if any, does f assume local maximum and minimum values? a. Find the critical points, if any. Select the correct choice below and, if necessary, fill in the O A. The critical point(s) of f is/are x = (Simplify your answer. Use a comma to separate answers as needed. ) O B. The function f has no critical points