the data shown in the following table: $.$

a$.$ Calculate the betas for portfolios A and B $.$

b$.$ Compare the risks of these portfolios to the market as well as to each other. Which portfolio is more risky?

a$.$ The beta for portfolio A is

$($Round to four decimal places.$)$

Data table

$($Click on the icon here in order to copy the contents of the data tablew

into a spreadsheet.$)$