Here are the returns on two stocks. Required: a-1. Calculate the variance and stondard 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 portfollo that invests an equal amount each month in the two stocks. c. Is the variance more of less than hafway between the variance of the two individual stocks? Complete this \&uestion by entering your answers in the tabs below, Calculate the variance and standard deviation of each stock. Fiste Do not round intermedste caiculations. Round vour answers to 2 decimal places