A stock has a beta of 1.0 and an expected return of 14 percent. A risk-free asset currently earns 4.5 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.85, what are the portfolio weights? c. If a portfolio of the two assets has an expected return of 9.25 percent, what is its beta? d. If a portfolio of the two assets has a beta of 1.36, what are the portfolio weights