beta to compare the risks of the portfolios, so she has gathered 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 $0\mathrm{.}8575.($Round to four decimal places.$)$

The beta for portfolio $B$ is $($Round to four decimal places.$)$

Data table

$($Click on the icon here ${}_h$ in order to copy the contents of the data table below into a spreadsheet.$)$

$\backslash$table$[[,,$Portfolio weights$],[$Asset$,$Asset beta,Portfolio A$,$Portfolio B$],[1,1\mathrm{.}11,15\%,30\%$