Month DJIA Nikkei 0.03 0.04 0.07 -0.02 -0.02 0.07 O UI A W N- 0.01 0.02 0.05 0.02 -0.06 -0.06 (i) Compute the monthly standard deviation for each index. (ii) Compute the covariance between the rates of return for the DJIA and the Nikkei. (iii) What is the correlation coefficient? What does it mean