7. Chancy can design a risky portfolio based on two risky assets, Chuck and Nancy. Chuck has an expected return of 15% and a standard deviation of 21%. Nancy has an expected return of 7% and a standard deviation of 11%. The correlation coefficient between the returns of Chuck and Nancy is 0.20. The risk-free rate of return is 4%. What is highest possible Sharpe ratio of Chancys portfolio?

9. Portfolio Omitopho is composed of two stocks, Omit and Opho. Omit has a standard deviation of 25%, while Opho has a standard deviation of 15%. The correlation coefficient between the returns on Omit and Opho is 0.16. Omit comprises 30% of the portfolio, while Opho comprises 70% of the portfolio. Risk free rate is 3%. Find the standard deviation of the return on portfolio Omitopho.

10. Pound Foolish can design a risky portfolio based on two risky assets, Pound and Foolish. The standard deviation of return on Pound is 24%, while the standard deviation on Foolish is 12%. The correlation coefficient between the two returns is .22. The expected return on Pound is 14%, while on Foolish it is 8%. Risk free rate is 4%. For the optimal risky portfolio, how much (in %) is invested in stock Pound?