please can you write the formula that you going to use

EXPECTED RETURNS Stocks X and Y have the following probability distributions of expected future returns: Probability Y 0.1 (10%) (35%) 0.2 2 o 0.4 12 20 0.2 20 25 0.1 38 45 a. b. Calculate the expected rate of return, fy, for Stock Y (fx = 12%). Calculate the standard deviation of expected returns, ox, for Stock X (Oy = 20.35%). Now calculate the coefficient of variation for Stock Y. Is it possible that most investors will regard Stock Y as being less risky than Stock X? Explain