6 Here are the returns on two stocks. Digital Executive +15 April +15 une a-1. Calculate the variance and standard deviation of each stock. (Do not round Intermedlate calculatlons. Round your answers to 2 declmal places.) Digital Cheese Executive Fruit Return Standard deviation -2. Which stock is the riskier if held on its own? Digital Cheese O Executive Fruit b. Now calculate the retums in each month of a portfolio that ivests an equal amount each month in the two stocks. (Negative amounts should be Indicated by a minus sign. Do not round Intermedlate calculations. Round your answers to 2 decimal places.) Month March Apri June August