Use the following information to answer the questions

Security	Beta	Standard Deviation	Expected return
S&P 500 Risk-free security Stock A Stock B Stock C	1.0 0.0 0.6 ( ) 1.2	20% 0% 15% 30% 25%	8.0% 4.0% ( )% 12.0% ( )%

1. A complete portfolio is composed of the risk-free security and a risky portfolio, Q, constructed with two risky securities, X and Y. Given the risk-free rate of 4%. X has an expected return of 10%, and Y has an expected return of 20%.

a.Given the expected return of 14% for the risky portfolio Q, what are the weights for X and Y, respectively?

b. You would like to form a complete portfolio with the expected return of 19%. What are the wights for the risk-free security and the risky portfolio Q, respectively?