Suppose that the S&P 500, with a beta of 1.0, has an expected return of 11% and T-bills provide a risk-free return of 4%. a. What would be the expected return and beta of portfolios constructed from these two assets with welghts in the S&P 500 of (1) 03 (1) 0.25; (111) 0.50; (iv) 0.75; () 1.0? (Leave no cells blank - be certain to enter "o" wherever required. Do not round Intermediate calculations. Enter the value of Expected return as a percentage rounded to 2 decimal places and value of Beta rounded to 2 decimal places.) Beta ) 0 Expected Return % % % 0.25 (iii) 0.50 (iv) 0.75 (v) 1.0 PH % % b. does expected return vary with ta? (Do not round intermediate calculations.) The expected return by % for a one unit increase in beta