Here are the returns on two stocks.

Required:

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?

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Req A$2$

Calculate the variance and standard deviation of each stock. $($Do not round intermediate calculations. Round your answers to $2$

decimal places.$)$