Problem 11-19 Diversification (LO3) Here are the returns on two stocks. Digital Cheese Executive Fruit +15 +8 January -2 February +1 March +4 +4 +6 April May +16 -3 +2 +2 +6 June July -2 -1 -7 August -1 a-1. Calculate the variance and standard deviation of each stock. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Digital Cheese Retum Executive Fruit Return Variance Standard deviation a-2. Which stock is the riskier if held on its own? Digital Cheese Executive Fruit b. Now calculate the returns in each month of a portfolio that invests an equal amount each month in the two stocks. (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) Portfolio Month Return January February March April May June July August Problem 11-19 Diversification (LO3) Here are the returns on two stocks. Digital Cheese Executive Fruit +15 +8 January -2 February +1 March +4 +4 +6 April May +16 -3 +2 +2 +6 June July -2 -1 -7 August -1 a-1. Calculate the variance and standard deviation of each stock. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Digital Cheese Retum Executive Fruit Return Variance Standard deviation a-2. Which stock is the riskier if held on its own? Digital Cheese Executive Fruit b. Now calculate the returns in each month of a portfolio that invests an equal amount each month in the two stocks. (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Round your answers to 2 decimal places.) Portfolio Month Return January February March April May June July August