3. Makoto decides to try a more symmetric glaze application on his next sushi platter. The platter is again 14 inches by 6 inches. This time the deepest blue is in a stripe along the long center line of the platter, and the intensity of the blue fades with the distance from this central line. The density of cobalt glaze is given by p(x) mg/square inch, where a is the distance (in inches) from the longitudinal center of the sushi platter. (a) Write a general Riemann sum that approximates the amount of cobalt Makoto used. (b) Write an integral in terms of p(x) that gives the exact amount of cobalt used