Given the data below:

a. Calculate the efficient frontier assuming no short sales are allowed.

b. Calculate the efficient frontier assuming that short sales are allowed.

c. Graph both frontiers on the same set of axes.

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A В Mean А B D E F returns 4 JA 5 B 6 JC 7 D 8 JE 0.0100 0.0000 0.0000 0.0000 0.0000 0.0400 0.0000 0.0000 0.0000 0.0000 0.0900 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.1500 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.3000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0550 0.0000 0.0000 0.2000 9 |F 0.0000 0.0000 0.0000