A stock has a beta of 1.35 and an expected return of 11 percent. A risk-free asset currently earns 3.6 percent. A.)What is the expected return on a portfolio that is equally invested in the two assets? B.)If a portfolio of the two assets has a beta of 0.81, what are the portfolio weights? C.)f a portfolio of the two assets has an expected return of 7 percent, what is its beta? D.) If a portfolio of the two assets has a beta of 2.70, what is the portfolio weight and risk-free wieght?