10) Let fbe the function defined by f(x) = 12x273 - 4x a) Find the intervals on which / is increasing by Find the x- and y-coordinates of all relative maximum points c) Find the x- and y coordinates of all relative minimum points d) Find the intervals over which fis concave downward. e) Using the information found in parts a, b, c, and d. sketch the graph of fon the axes provided 20+ X 10