Please answer correcly.. previous two times i have received the wrong answer.

A stock has a beta of 0.7 and an expected return of 8 percent. A risk-free asset currently earns 3 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.) Expected return 55 % b. If a portfolio of the two assets has a beta of 0.4, what are the portfolio weights? (Round your answers to 2 decimal places. Omit the "%" sign in your response.) c. If a portfolio of the two assets has an expected return of 6 percent, what is its beta? (Round your answer to 2 decimal places.) Beta 0.42 d. If a portfolio of the two assets has a beta of 2.80, what are the portfolio weights? (Negative amounts should be indicated by a minus sign. Omit the "%" sign in your response.)