16. Find the critical point(s) of f(x) = x2ex. [A] x = 0,2 [B] x = 0 [C] x = -1, 0, 2 [D] None [E] x = 2 17. How many local maxima does the function f(x) = 2x5 - 5x4 - 10x3 + 4 have ? [A] 4 [B] 3 [C] 0 [D] 2 [E] 1