and if possible, please explain why. Thank you.

6. (20 pts) Draw the feasible region for the following cases 1) with no-short constraint, and 2) without no-short constraint (a) (3 pts) two risky securities with the same mean but with different standard deviations (b) (3 pts) two risky securities with the same standard deviation but with different means (c) (4 pts) three risky securities with the same mean but with different standard deviations (d) (5 pts) one is risk-free asset (rf) and the other is a risky asset with mean pi and standard deviation o (e) (10 pts) a risk free security and two risky securities. Herein, the risky securities are independent to each other (correlation = 0) and have different means, and different standard deviations. In addition, the risk-free rate is lower than the means of the risky securities. 6. (20 pts) Draw the feasible region for the following cases 1) with no-short constraint, and 2) without no-short constraint (a) (3 pts) two risky securities with the same mean but with different standard deviations (b) (3 pts) two risky securities with the same standard deviation but with different means (c) (4 pts) three risky securities with the same mean but with different standard deviations (d) (5 pts) one is risk-free asset (rf) and the other is a risky asset with mean pi and standard deviation o (e) (10 pts) a risk free security and two risky securities. Herein, the risky securities are independent to each other (correlation = 0) and have different means, and different standard deviations. In addition, the risk-free rate is lower than the means of the risky securities