Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 3.5% + 0.65RM + eA RB -1.6% + 0.8RM + eB OM = 21%; R-squareA = 0.22; R-squares = 0.14 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