Parts B and D are true false questions, parts A and C the answer is a number

5 pts Suppose that a continuous function f(x) has horizontal tangent lines at x = -1, x = 0 and x = 1. If f"(x) = 2x - x, answer the questions below. (a) By the Second Derivative Test, f(x) has a relative maximum at [ Select ] (b) The Second Derivative Test cannot be used to determine if f(x) has a relative maximum or minimum at x = 0. [ Select ] (c) f(x) has exactly [ Select ] inflection points. (d) The graph of f lies above its tangent line around x = 2. Hint: consider concavity and draw a sketch. [ Select ]