Calculate the envelope set (frontier) for the following four assets and show that the individual assets all lie within this envelope set. Can you show formulas in excel ?

4. Calculate the envelope set for the four assets below and show that the individual assets all lie within this envelope set. 0.1 0.01 0.03 0.05 A FOUR-ASSET PORTFOLIO PROBLEM Variance-covariance 0.01 0.03 0.05 0.3 0.06 -0.04 0.06 0.4 0.02 -0.04 0.02 0.5 Mean returns 6% 8% 10% 15% 4. Calculate the envelope set for the four assets below and show that the individual assets all lie within this envelope set. 0.1 0.01 0.03 0.05 A FOUR-ASSET PORTFOLIO PROBLEM Variance-covariance 0.01 0.03 0.05 0.3 0.06 -0.04 0.06 0.4 0.02 -0.04 0.02 0.5 Mean returns 6% 8% 10% 15%