Determine the local maximum and minimum values of f x x 9x 3 using the second derivative test when it applies O O Local minimum value is 18 at x 0 Local maximum value is 18 at x 6 Local maximum value is 18 at x 0 Local minimum value is 18 at x 6 Local maximum value is 3 at x 0 Local minimum value is 111 at x 6 Local minimum value is 3 at x 0 Local maximum value is 111 at x 6