Q21 Suppose we only have two stocks available in the market. The table below presents the yearly returns on stocks X and Y for a three-year period Please use the information above for Q21(a) to Q21(e) Please round your answer to 4 decimal places as 0.1234 ) Q21(a). Using the average returns as the estimator for the expected returns for these two stocks. If you want to form a portfolio with expected returns of 18% using these two stocks, Q21(b). What is the variance of the portfolio that you constructed in Q21(a)? (3 marks) Q21 Suppose we only have two stocks available in the market. The table below presents the yearly returns on stocks X and Y for a three-year period Please use the information above for Q21(a) to Q21(e) Please round your answer to 4 decimal places as 0.1234 ) Q21(a). Using the average returns as the estimator for the expected returns for these two stocks. If you want to form a portfolio with expected returns of 18% using these two stocks, Q21(b). What is the variance of the portfolio that you constructed in Q21(a)