Let g(w) = a w4 w3 where w, a, and b are all positive. (a) Find g '(w) = (b) Find the w-coordinate of the critical point of g(w). W = (c) Use the First Derivative Test to classify the critical point (c.p.). c.P. Which of the following would be an appropriate value of w to use to check the sign of g '(w) for the interval 0