1) For each of the following: (i) Determine the intervals on which the following functions are increasing and decreasing. (ii) Use the first derivative test to classify each of the critical points as a relative minimum, a relative maximum, or neither one. Make sure that you read the directions on the front cover before attempting problems 1, 2, and 3 and I STRONGLY recommend that you review the lecture examples referenced in those instructions to lessen the possibility of losing points due to not showing the necessary work to support your answers. a) f(x) = x4+12x3 - 72x2+ 216