Problem $13-7$ Calculating Returns and Standard Deviations $[$LO$1]$

Consider the following information:

$\backslash$table$[[,,$Rate of Return if State Occurs$],[$State of Economy,,$],[,$of Economy,Stock A$,$Stock B$],[$Recession$,20,08,-15],[$Normal$,50,11,\mathrm{.}14],[$Boom$,30,16,\mathrm{.}31]]$

a$.$ Calculate the expected return for Stocks A and B$.($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$..32\mathrm{.}16.)$

b$.$ Calculate the standard deviation for Stocks A and B$.($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[$a$.$ Stock A expected return,,$\%$