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Here are the returns on two stocks.Digital CheeseExecutive FruitJanuary+18+7February?2+1March+4+3April+6+16May?3+2June+2+5July?1?2August?7?1a-1. Calculate the variance and standarddeviation of each stock. (Do not round intermediatecalculations. Round your answers to 2 decimal places.)a-2. Which stock is the riskier if held on itsown?Digital CheeseExecutive Fruitb. Now calculate the returns in each month of aportfolio that invests an equal amount each month in the twostocks. (Negative amounts should be indicated by a minussign. Do not round intermediate calculations. Round your answers to2 decimal places.)c. Is the standard deviation more or less thanhalf way between the variance of the two individual stocks?LessMore