here are the return on two stocks.

Digital Cheese Executive Fruit

January +19 +9

February -2 +1

March +4 +4

April +6 +13

May -3 +1

June +3 +5

July -1 -2

August -7 -1

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?

Do not round intermediate calculations. round your answers to 2 decimal places.