Suppose the current T-bill rates is 5%, the expected return for stock A is 15%, with a standard deviation of 15%, the expected return for a real estate asset is 10%, with a standard deviation of 10%. Correlation between stocks and real estate is 25%.

c. If we borrow $1 at the risk-free rate, and invest $2 in the risky mixed asset portfolio. What is the expected return and risk?

Why the R_{2 and 2 in this question is 22.5% and} 0.3649?