#$3$

Compute the missing values in the classic risk analysis computation shown below. Based on the Annualized Net Countermeasure Value, which countermeasure is a better solution?

$\backslash$table$[[,,$Countermeasure$],[,$Base Case,A$,$B$],[$Asset Value $($EF$),$$$800,000,$$$800,000,$$$800,000],[$Exposure Factor $($EF$),75\%,50\%,62\mathrm{.}50\%],[$Single Loss Expectancy $($SLE$)$: $=$ AV $*$EF$,$$$600,000,$$$400,000,$$$500,000],[$Annualized Rate of Occurrence $($ARO$),50\%,50\%,50\%],[$Annualized Loss Expectancy $($ALE$)$: $=$ SLE$*$ARO$,$$$300,000,$$$200,000,$$$250,000],[$ALE Reduction for Countermeasure,NA$,?,?],[$Annualized Coutermeasure Cost,NA$,$$$80,000,$$$30,000],[$Annualized Net Countermeasure Value,NA$,?,?]]$

Be sure to show how you arrived at the solution