x2. 3) Given: f(x) = -6X 6(3x2+4) f' ( x) = (x2-4)2 f" (x) = x2-4 (x2-4)3 a) Find the x and y intercepts, and H.A and V.A. (if any) b) The local extrema and the intervals of increase/decrease. c) The inflection points and the intervals of concavity. d) Sketch the graph