5 Given the function a Find the intervals of increase decrease T 1 3 increase 3 U 3 007 decreaso 0 1 f x x 6x 9x b Find the local max min values 2 f y 3x 12Y 9 3 x 4x 3 x 3 x 1 crit x 3 X 1 31 6 3 9 3 0 3 07 local Min 1 6 1 4 1 4 1 4 local may c Find the point s of inflection fo 6x 12 by 2 12 X 12 b x 2 d Find the intervals of concavity 2 DO e Sketch f x above using a d and any other useful information found