7. The probability distribution of the return on an investment in Alpha, Ltd.'s common shares is as follows: Return 8.5% 10.6% 18.0% Probability 0.15 0.45 0.40 da) Find the expected return. 4. b) Calculate the variance of the returns. 1 c) Calculate the standard deviation of the returns. d ) Calculate the coefficient of variation. 1 - 1 / 1 Songea @ CPU PE