Mustang is 0.9, how would your answer to Part a change? 4. An investor currently has all of his wealth in Treasury bills. He is considering investing one-third of his funds in General Electric, whose beta is 1.30, with the remainder left in Treasury bills. The expected risk-free rate (Treasury bills) is 6 percent and the market risk premium is 8.8 percent. Determine the beta and the expected return on the proposed portfolio