321.6%% per year. Stock L has an expected return of 17.2% per year and an expected return variance of 402.2%% per year. The covariance of the expected returns.is -332.8%%. What is the correlation coefficient between the expected returns of stocks Z and L? 1) -0.77 2) -0.86 3) -0.90 4) -0.83 5) -0.93