a. Calculate expected excess returns, olpha values, and residual variances for these stocks. Instruction: Enter your answer as a percentage (rounded to two decimal places) for expected excess returns and alpha values. ExpectedexcessreturnonstockAExpectedexcessreturnonstockB%% Expected excess Alpha of stock B Instruction: Enter your answer as a decimal number rounded to two decimal places for residual variances. Residual variance of stock A Residual variance of stock B Instruction: for part b, enter your response as a decimal number rounded to four decimal places. b. Suppose that the portfollo manager follows the Treynor-Black model, and constructs an active portfollo (p) that consists of the abov two stocks. The alpha of the actlve portfollo (p) is 18%, and its residual standard devlation is 150%. What is the Sharpe ratio for the optimal portfollo (consisting of the passive equity portfollo and the active portfollo (p)? What's the M2 of the optimal portfolio