Data has been gathered on the following securities under consideration for an investment portfolio. The Risk-free rate is 6.0% and Variancem is 12.

Stock Ex. Return Beta Var.

A 15 1.2 20

B 18 1.5 40

C 9 0.7 10

D 8 0.4 9

E 24 1.8 55

F 13 1.1 35

G 7 0.2 4

H 31 1.9 60

I 11 1.8 35

J 17 1.5 24

Can you help show me what the optimal portfolio is with no short sales allowed, and with short sales allowed using the standard definition?

Which client would this portfolio be suitable for? I am having trouble with this concept.