Please help me solve these questions.

You are considering investing $1,000 in a complete portfolio. The complete portfolio is composed of treasury bills that pay 5% and a risky portfolio, P, constructed with 2 risky securities X and Y. The optimal weights of X and Y in P are 60% and 40% respectively. X has an expected rate of return of 14% and Y has an expected rate of return of 10%. 62. To form a complete portfolio with an expected rate of return of 11%, you should invest of your complete portfolio in treasury bills A. 19% B. 25% C. 36% D. 50% 63. To form a complete portfolio with an expected rate of return of 8%, you should invest approximately in the risky portfolio. This will mean you will also invest approximately of your complete portfolio in security X and Y respectively and A. 0%, 60%, 40% B. 25%, 45%, 30% C. 40%, 24%, 16% D. 50%, 30%, 20%