1)In Excel, calculate the expected standard deviation of a portfolio consisting of 25% asset A, 50% asset B, and 25% asset C.(DO NOT Use of the Excel stdev or related function )

2)Given a risk free rate of 3.5% and a market portfolio with a return of 9% and s of 15%, what combination of assets would a risk averse investor hold if he wanted to maximize returns but have no more than 8% volatility?

3)Given a risk free rate of 3% and a market portfolio with a return of 8% and s of 13%, what combination of assets would a less risk averse investor hold if she wanted to maximize returns but have no more than 15% volatility?