The following are rates of return for Grantham Corp and Grace Industries: Month Grantham 1 -0.18 2 0.15 3 -0.19 4 0.135 5 -0.09 6 0.22 7 0.39 8 -0.08 9 -0.03 10 0.19 11 0.21 12 -0.25 Grace 0.075 0.092 -0.29 -0.32 0.18 0.09 -0.26 0.15 -0.09 0.39 -0.27 0.40 Compute the following: a) Average monthly return for each stock b) Standard Deviation of returns for each stock c) Covariance between the rates of return d) The correlation coefficient between the rates of return