Which set of firms has the most variable or volatile stock returns? (Select the best choice below.) A. Computer and Software firms B. Utilities (Related to Checkpoint 5.3) (Systematic risk and expected rates of return) The following table, , contains beta coefficient estimates for six frms. Calculate the expected increase in the value of each firmis shares it the market portolio were to increase by 10 percent. Perform the same calculation where the market drops by 10 percert. Which set of firms has the most variable of volatle slock returns? Data table