Use the graph of f' and f" to find the critical points and inflection points of f, the intervals on which f is increasing and decreasing, and the intervals of concavity. Then, graph f assuming f(0) = 0. Find the intervals of concavity. f is concave up on (0,2) . (Type your answer in interval notation. Use a comma to separate answers as needed.) f is concave down on (2,4). (Type your answer in interval notation. Use a comma to separate answers as needed.) Graph f assuming f(0) = 0. Choose the correct graph below. O A. O B. O C. OD. Q 3