Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 4.5% + 1.40RM + eA RB = -2.2% + 1.7RM + eB OM = 24%; R-squares = 0.30; R-squarep = 0.20 What is the standard deviation of each stock? (Do not round intermediate calculations. Round your answers to 2 decimal places.) Standard Deviation Stock A % Stock B %