Here are the percentage returns on two stocks. Month January February March April May June July August Digital Cheese 15% Variance Standard deviation % -4 5 7 5339 -5 Executive Fruit 7% 2 3 15 1 5 -5 -3 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 30.0 0.6 Executive Fruit 36.7 5.5