Problem 7-12 Diversification Here are the percentage returns on two stocks. Executive Fruit Month January February March April May June July August Digital Cheese 15% -4 5 7 -5 3 -3 2 5 15 1 5 -1 a-1. Calculate the monthly variance and standard deviation of each stock. (Do not round Intermediate calculations. Round your answers to 1 decimal places.) Digital Cheese Executive Fruit Variance Standard deviation % a-2. Which stock is the riskler if held on its own? Digital Cheese Executive Fruit b. Now calculate the variance and standard deviation of the returns on a portfolio that Invests an equal amount each month in the two stocks. (Do not round Intermediate calculations. Round your answers to 1 decimal places.) Variance Standard deviation % c. Is the variance more or less than half way between the variance of the two Individual stocks? more than the 50%-50% less than the 50%-50%