Based on current dividend yields and expected capital gains, the expected rates of return on portfolios A and Bare 12% and 16%. respectively. The beta of Ais 7, while that of Bis 1.4. The T-bill rate is currently 5%, whereas the expected rate of return of the S&P 500 index is 13%. The standard deviation of portfolio A is 12% annually, that of Bis 31%, and that of the S&P 500 index is 18%. a. Calculate the alphas for the two portfolios. (Round your answers to 1 decimal place.) % Portfolio A Portfolio B %