Here are the percentage returns on two stocks. a-1. Calculate the monthly variance and standard deviation of each stock. (Do not round intermediate calculations. Round your answer to 1 decimal place.) 8 Answer is complete but not entirely correct. a-2. Which stock is the riskier 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 tw stocks. (Do not round intermediate calculations. Round your answer to 1 decimal place.) Answer is complete but not entirely correct. c. Is the varlance more or less than half way between the variance of the two individual stocks? more than the 50%50%