Asset 1 has an expected return of 10% with a standard deviation of 25%, and asset 2 has an expected return of 15% and a standard deviation of 35%. The covariance between the returns is 0.0175 and the risk-free rate is 8%. (a) What is the optimal portfolio consisting of risky assets and risk-free asset if you want an average return of 0.10? (b) Can you find a portfolio consisting of risky and risk-free assets with average return of 0.10 and variance of return 0.009? Why or why not?