8). The returns on shares of S and T vary depending on the state of the economic growth. State of economy Probability of Returns on Sif Returns on Tif Economic state economic state occurs economic state occurs occurring (%) Recession 0.20 -10 19 Growth 0.60 19 17 Boom 0.20 40 14 Required: a. Calculate the expected return and standard deviation for Share S and T. b. What are the covariance and the correlation coefficient between returns of S and T