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The function f graphed below is defined by a polynomial expression of degree 4. Use the graph to solve the exercise. (a) A function value f(a) is a local maximum value of f if f(a) is the ---Select-- v| value of fon some open interval containing a. From the graph of f we see that there are two local maximum values of f: one local maximum is and it occurs when x - 2; the other local maximum is and it occurs when x = (b) The function value f(a) is a local minimum value of fif f(a) is the - Select- w|value of fon some open interval containing a. From the graph of f we see that there is one local minimum value of f. The local minimum value is , and it occurs when x =