please answer both

1. Compute the expected return for a three-stock portfolio with the following: Standard Deviation Weight 20% 0.2 28% 0.3 18% 40% 0.5 Stock Expected Return A 10% B 12% a. 13.3% b. 14.6% c. 29.3% d. 32.4% 2. A portfolio is considered to be efficient if a. there is no other portfolio with a higher expected return b. there is no other portfolio with a lower risk there is no other portfolio offers a higher expected return with a higher risk d. there is no other portfolio offers a lower risk with the same expected return