Here are the returns on two stocks DigitalExecutive Cheese Fruit +8 January February March April May June July +15 +1 +16 +6 +6 -2 a-1. Calculate the variance and standard deviation of each stock. (Do not round Intermedlate calculations. Round your answers declmal places.) Digital Cheese Executive Fruit Retum Return Standard deviation a-2. Which stock is the riskier if held on its own? O Digital Cheese O Executive Fruit b. Now calculate the retums in each month of a portfolio that invests an equal amount each month in the two stocks. (Negative amounts should be indicated byminus sign. Do not round Intermediate calculations. Round your answers to 2 decimal place Month February March Apri May June July August c. is the standard deviation more or less than half way between the variance of the two individual stocks? 0 Less