$($b$)$ It is time for the annual performance review of Go$-$Com's account executives. Account values and hours spent each week acquiring and servicing accounts are shown below.

$\backslash$table$[[$Agents$,$Albert,Bates,Cressey,Duong,,$],[$Potential accounts,$$100,000,$$$40,000,$$$80,000,$$$200,000,,],[$Current accounts,$$40,000,$$$40,000,$$$150,000,$$$100,000,,],[$Labor hours,$\frac{40(h)}{\text{w}\text{c}\text{e}\text{k}},20,60,80,4045,2045$