2. Suppose that f (x) is a polynomial whose critical points are at x = -2 , 2, and 4. Values of f'(x) , the derivative of f (x) are given in the table below. a) (2 points) Which (if any) of the critical points of f (x) are relative minima of f (x) ? Explain your reasoning. b) (2 points) Which (if any) of the critical points of f (x) are relative maxima of f (x) ? Explain your reasoning