Phoenix Company common stock is currently selling for $20 per share. Security analysts at Smith Blarney have assigned the following probability distribution to the price of (and rate of return on) Phoenix stock one year from now: Price Rate of Return Probability $16 –20% 0.25 20 0% 0.30 24 +20% 0.25 28 +40% 0.20 Assuming that Phoenix is not expected to pay any dividends during the coming year, determine the coefficient of variation for the rate of return on Phoenix stock.