A portfolio manager summarizes the input from the macro and micro forecasters in the following table: Micro Forecasts Expected Residual Standard Return (%) Beta Deviation (%) 21 1.3 18 1.6 17 1.1 10 1.2 50 Asset Stock A Stock B Stock C Stock D 52 Macro Forecasts Expected Return Asset (%) T-bills Passive equity portfolio Standard Deviation 15 a. Calculate expected excess returns, alpha values, and residual variances for these stocks. (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Round "Alpha values" to 1 decimal place.) Stock A Stock B Stock C Stock D Excess returns Alpha values Residual variances b. Compute the proportion in the optimal risky portfolio. (Do not round intermediate calculations. Enter your answer as decimals rounded to 4 places.) Proportion A portfolio manager summarizes the input from the macro and micro forecasters in the following table: Micro Forecasts Expected Residual Standard Return (%) Beta Deviation (%) 21 1.3 18 1.6 17 1.1 10 1.2 50 Asset Stock A Stock B Stock C Stock D 52 Macro Forecasts Expected Return Asset (%) T-bills Passive equity portfolio Standard Deviation 15 a. Calculate expected excess returns, alpha values, and residual variances for these stocks. (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Round "Alpha values" to 1 decimal place.) Stock A Stock B Stock C Stock D Excess returns Alpha values Residual variances b. Compute the proportion in the optimal risky portfolio. (Do not round intermediate calculations. Enter your answer as decimals rounded to 4 places.) Proportion