10. Assume you have all your wealth (a million dollars! invested in the Vanguard 500 index fund, and that expect to earn an annual return of 12%, with a st dard deviation in returns of 25%. Since you have becomt more risk averse, you decide to shift $ 200,000 from the Vanguard 500 index fund to treasury bills. The T-bill rate is 5%. Estimate the expected return and standard devia- tion of your new portfolio