(Related to Checkpoint i.3) (Systematic risk and expected rates of return) The following table, contains beta coeficiont etimates for aix firms. Calcuhate the expected increase in the velue of each frmis shares if the madet portfolio were to increase by 10 percent. Perform the same calculaton where the maknt drops by 10 percent. Which set at fims has the most variable of volitle stock returns? Which set of firms has the most variable or volatle stock returns? (Salect the best choice below.) A. Utilities B. Computer and Soffure firms