Given the following probability distribution, what are the expected return and the standard deviation of returns for Security J? 8.40%;5.41% 7.90%;5.11% 7.40%;4.81% 6.90%;5.71% 6.40%;6.01% Below are the stock returns for the past five years for Agnew Industries: What were the stock's arithmetic and geometric means during this five-year period, respectively? 8.6%;7.91% 9.6%;8.91% 9.6%:7.31% 10.6%:7.91% 10.6%;7.31%