The ordering and transportation cost C for components used in a manufacturing process is approximated by the function below, where C is measured in thousands of dollars and X is the order size in hundreds. C(X) : 11% + i) (a) Verify that 13(2) = C(15). C(2) : x C(15) 7 (b) According to Rolle's Theorem, the rate of change of the cost must he 0 for some order size in the interval (2, 15). Find that order size. (Round your answer to the nearest whole number.)