Consider again the same situation with 4 assets and the following expected rates of return and variance-covariance matrix:
	0.2				0.25	0.034	0.016	0.019
m=	0.16			V=	0.034	0.88	0.032	0.046
	0.05				0.016	0.032	0.15	0.027
	0.1				0.019	0.046	0.027	0.102
Compute and plot the mean-variance efficient frontier by using the equation from the notes (plot E(Rp) against the standard deviation)
Note: Plot an expected return range of 0% to 30%, with 1% increments (no need to go higher than 30%)