%	r%
A	14	13
B	12	15.5
C	17.33	18.5
D	20	19
E	20	20
F	23	21
G	26	21
H	36	23

Five of these portfolios are efficient, and three are not. Which are the inefficient ones?

Suppose you can also borrow and lend at an interest rate of 10%. Whish of the above has the highest Sharpe ratio?

Suppose you are prepared to tolerate a standard deviation of 20%. What is the maximum expected return that you can achieve if you cannot borrow or lend?

What is your optimal strategy if you can borrow or lend at 10% and are prepared to tolerate a standard deviation of 15% What is the maximum expected return that you can achieve with this risk?