Question 74, 13.3.45 HW Score: 86.23%, 72.43 of 84 points ent B Save Part 1 of 9 Points: 0 of 1 Determine the intervals on which the function is increasing, decreasing, concave up, and concave down; relative maxima and minima; inflection points; symmetry; and those intercepts that can be K obtained conveniently. Then sketch the graph. f ( x) = 3x4 - 36x Where is the function increasing and decreasing? Select the correct choice below and fill in the answer box(es) to complete your choice. (Type your answer in interval notation. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) O A. The function is decreasing on and never increasing. O B. The function is increasing on and decreasing on O C. The function is increasing on and never decreasing