A stock has a beta of 1.1 and an expected return of 9 percent. A risk-free asset currently earns 4 percent. a. What is the expected return on a portfolio that is equally invested in the two assets? (Round your answer to 2 decimal places. Omit the "\%" sign in your response.) b. If a portfolio of the two assets has a beta of 0.8, what are the portfolio weights? (Round your answers to 2 decimal places. Omit the %n " sign in your response.) c. If a portfolio of the two assets has an expected return of 8 percent, what is its beta? (Round your answer to 2 decimal places.) d. If a portfolio of the two assets has a beta of 3.30, what are the portfolio weights? (Negative amounts should be indicated by a minus sign. Omit the "\%" sign in your response.)