14) A 26-foot ladder is placed against a wall. If the top of the ladder is sliding down the wall at 2 feet per second, at what rate is the bottom of the ladder moving away from the wall when the bottom of the ladder is 10 feet away from the wall? A) 2.4 ft/sec B) 4.8 ft/sec C) 5.2 ft/sec D) 9.6 ft/sec 15) Find the critical values and determine the intervals where f(x) is increasing and the intervals where f(x) is decreasing for the function f(x)-x3 3x2-24x+6. A) decreasing on (-,-4) (2, ); increasing on (-4,2) B) increasing on (-,-4); C) increasing on (-,-4) D) increasing on (--,-4) decreasing on (-4, 2) (2.-); decreasing on (-4, 2) (2.); decreasing on (-4,-) 5