Suppose that the graph below is the graph of f'(x), the derivative of a function a) List any interval(s) on which f(x) is increasing. Select the correct choice f(x). Find the open intervals where f(x) is a) increasing, or b) decreasing. below and fill in any answer boxes within your choice. Ay O A. (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) O B. The function f(x) is never increasing. X b) List any interval(s) on which f(x) is decreasing. Select the correct choice below and fill in any answer boxes within your choice. O A. (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) O B. The function f(x) is never decreasing