Find the intervals where the function is increasing and decreasing for the following function. f(x) =12x -x3 Select all the true statements below. Of(x) is increasing on the interval ( - oo, - 2) O f(x) is decreasing on the interval ( - oo, - 2) Of(x) is increasing on the interval ( - 2,2) Of(x) is decreasing on the interval ( - 2,2) Of(x) is increasing on the interval (2, co) Of(x) is decreasing on the interval (2, co)