Suppose the function f has second derivative f"(x) = x (x - 5)"(x + 8) (x - 1). (a) How many inflection points does f have? Where do they occur? (Enter your answers as a comma-separated list.) X = (b) Suppose f has horizontal tangent lines at x = -9, , 0, 8, -2. Which correspond to a local maximum? A local minimum? Which cannot be determined by the second derivati separated list.) local maximum X local minimum X = cannot be determined X =