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) = 12 1 x + x x+3 (a) verify that c(3) = c(6). c(3) = 10 correct: your answer is correct. c(6) = 10 correct: your answer is correct. (b) according to rolle's theorem, the rate of change of the cost must be 0 for some order size in the interval (3, 6). find that order size. (round your answer to the nearest whole number.)