Assume you currently have all your wealth ($1MM) invested in the Vanguard 500 index fund, and that you expect to earn an annual return of 7%, with a standard deviation of returns of 20%. Since you have become more risk averse, you decide to shift $250,000 from the Vanguard 500 index fund to Treasury bills. The T-bill rate is 1.5%. Estimate the expected return and standard deviation of your new portfolio.