I have already solved a,b,c and d, I just need help with e.

Exercise 3: The following are monthly percentage price changes for four market indexes Month DJIA S&P 500 Russell 2000 Nikkei 1 0.03 0.02 0.04 0.04 2 0.07 0.06 0.10 -0.02 3 -0.02 -0.01 -0.04 0.07 4 0.01 0.03 0.03 0.02 5 0.05 0.04 0.11 0.02 6 -0.06 -0.04 -0.08 0.06 Compute the following: a. Average monthly rate of return for each index DJIA S&P 500 Russell 2000 Nikkei Average 0.0133 0.0167 0.0267 0.0325 b. Standard deviation for each index DJIA S&P 500 Russell 2000 Nikkei SD 0.0476 0.0361 0.0753 0.0325 c. Covariance between the rates of return for the following indexes: DJIA - S&P 500 -0.0014 S&P 500 - Russel 2000 = 0.0022 S&P 500 - Nikkei = -0.0009 d. The correlation coefficients for the same four combinations DJIA - S&P 500 = 0.9723 S&P 500 - Russel 2000 = 0.9579 S&P 500 - Nikkei = -0.8964 e. Using the answers from parts (a), (b), and (d), calculate the expected return and standard deviation of a portfolio consisting of equal parts of (1) the S&P and Russell 2000 and (2) the S&P and the Nikkei. Discuss the two portfolios