Please Help me figure this out.

Use the data provided to perform the following analysis.

1. Calculate the efficient frontier assuming short sales are allowed;
2. Calculate the efficient frontier assuming no short sales are allowed;
3. Graph both frontiers on the same set of axes.

Variance-covariance matrix
	A	B	C	D	E	F		Mean returns
A	0.0100	0.0000	0.0000	0.0000	0.0000	0.0000		0.0100
B	0.0000	0.0400	0.0000	0.0000	0.0000	0.0000		0.0200
C	0.0000	0.0000	0.0900	0.0000	0.0000	0.0000		0.0300
D	0.0000	0.0000	0.0000	0.1500	0.0000	0.0000		0.0400
E	0.0000	0.0000	0.0000	0.0000	0.2000	0.0000		0.0500
F	0.0000	0.0000	0.0000	0.0000	0.0000	0.3000		0.0550