Pizza Palace offers five sizes: personal (8 inches), small (10 inches), medium (12 inches), and extra large (16 inches). The cost C(d), of making a pepperoni pizza can be expressed as a function of the diameter, d, of the pizza. A. What is the average rate of change in cost from an 8 inch to a 16 inch in pizza? B. What does this value mean in the context of this problem?