Philly Co.s stock is selling for $22 per share. Economists have assigned the following probability distribution to the rate of return on Philly's stock one year from now: Rate of Return Probability -10% 0.25 0% 0.30 +10% 0.25 +20% 0.20 Determine the expected rate of return on this stock. 4% 0% 8% 10%