Consider the following. (If an answer does not exist, enter DNE.) f(x) = 2x- 18x-+ 48x- 2 (a) Find the interval(s) on which f is increasing. (Enter your answer using interval notation. ) (-00, 2) U ( 4, 00 (b) Find the interval(s) on which f is decreasing. (Enter your answer using interval notation.) (2,4) (c) Find the local minimum and maximum value of f. local minimum value 4,30 X local maximum value 2,38 X