help please

Intro You have $90,000 to invest. You've done some security analysis and generated the following data for two stocks and Treasury bills: Security Expected return (%) Variance Correlation with stock A Stock A Stock B T-bills 12 10 2 0.04 0.0256 0 1 0.3 0 Part 1 Attempt 3/5 for 9.6 pts. What is the weight of stock A in the optimal risky portfolio (ORP)? 3+ decimals Missing answer Submit Part 2 | Attempt 1/5 for 10 pts. If you invest 30% of your funds in T-Bills, what is the expected return of this complete portfolio? 3+ decimals ccepi Part 3 | Attempt 1/5 for 10 pts. What is the standard deviation of the optimal risky portfolio? 3+ decimals Submit Part 4 Attempt 1/5 for 10 pts. What is the Sharpe ratio of your complete portfolio? 2+ decimals Submit Part 5 | Attempt 1/5 for 10 pts. How much money do you have to invest in stock B to achieve this Sharpe ratio (in $)? 0+ decimals