A stock has a beta of 0.9 and an expected return of 9 percent. A risk-free asset currently earns 4 percent. What is the expected return on a portfolio that is equally invested in the two assets? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. If a portfolio of the two assets has a beta of 0.5, what are the portfolio weights? Note: Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. If a portfolio of the two assets has an expected return of 8 percent, what is its beta? Note: Do not round