The rate of return on Jurassic Jalopies, Inc., stock over the last five years was 25 percent, 17 percent, -22 percent, 29 percent, and 8 percent. Over the same period, the return on Stonehenge Construction Company's stock was 9 percent, 13 percent, 3 percent, 16 percent, and 6 percent. What was the average retum on each stock over this period?