f' ( -3) =f' (2)=0 Increasing on (-3, 2) U (2, oo) Decreasing on (-oo, -3) f" ( -3) = 1" (2 ) = 0 Concave upward on (-00, -4) U (2, 00 ) Concave downward on (- , 2) 60- 40 20- O -10 -Ro- -40 - 40 O -10 - 10 -20- -40- 8 ! 40- 20- O -10 -5- Jot 1 O -10- -5- 1 -20- - 40 60 T 20 O - 10 -20