A stock has a beta of 0.9 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 "%" 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 1.80, what are the portfolio weights? (Negative amounts should be indicated by a minus sign. Omit the "%" sign in your response.) Please give detailed solution. Not just answer. thanks