Assume that the annual risk-free rate is 0.4% and consider an investor whose coefficient of risk aversion equals to 3. Use the formula in the Appendix below (based on the Markowitz model) to find the optimal weight of each stock and T-bills in the complete portfolio of the investor.

Stock 1				Stock 2				stock 3				stock 4				stock 5
Historical mean return	0.0155121			Historical mean return	0.014925067			Historical mean Return	0.013926724			Historical mean return	0.001832779			Historical mean return	0.003024458
Variance	0.006939316			Variance	0.00222731			Variance	0.004000396			Variance	0.002823309			Variance	0.000331189
Std Dev	0.083302555			Std Dev	0.04719439			Std Dev	0.063248685			Std Dev	0.053134821			Std Dev	0.018198605