The rates of return on Cherry Jalopies, Inc., stock over the last five years were 19 percent, 11 percent, 1 percent, 3 percent, and 12 percent. Over the same period, the returns on Straw Construction Companys stock were 16 percent, 20 percent, 4 percent, 3 percent, and 20 percent. What was the arithmetic average return on each stock over this period?