Use the following information for questions $6$ to $9.$ Suppose we construct a portfolio with $20\%$ of Stock A and $80\%$ Stock B$.$

Question $6$: Calculate the Expected Return of the Portfolio

Question $7$: Calculate the Standard Deviation of the Portfolio

Question $8$: Calculate the Sharpe Ratio of the Portfolio

Question $9$: Which portfolio would we select; one with $20\%$ in Stock A and $80\%$ in Stock B or a portfolio with $30\%$ in Stock A and $70\%$ in Stock B$?$

Question $10$: Calculate the Minimum Variance Portfolio.