Problem 11-19 Diversification (LO3) Here are the returns on two stocks. Digital Executive Cheese Fruit January +18 +7 February -2 +1 March +4 April +6 +16 May -3 +2 June +5 -1 -2 July August -7 -1 Required: a-1. Calculate the variance and standard deviation of each stock. a-2. Which stock is riskier if held on its own? b. Now calculate the returns in each month of a portfolio that invests an equal amount each month in the two stocks. c. Is the variance more or less than halfway between the variance of the two individual stocks? +3 dy Between the variance of the two individual stocks? Complete this question by entering your answers in the tabs below. Req A1 Req A2 Req B. Req C Calculate the variance and standard deviation of each stock. (Do not round intermediate calculations. R 2 decimal places.) Digital Cheese Retum Executive Fruit Return Variance 50.90% % Standard deviation 7.10 Reg A1 Req A2 >