In the post office example, suppose that each full$-$timeemployee works $8$ hours per day. Thus, Mondays re$-$quirement of $17$ workers may be viewed as a requirement of$8(17)136$ hours. The post office may meet its daily laborrequirements by using both full$-$time and part$-$timeemployees. During each week, a full$-$time employee works$8$ hours a day for five consecutive days, and a part$-$timeemployee works $4$ hours a day for five consecutive days. Afull$-$time employee costs the post office $$15$ per hour,whereas a part$-$time employee $($with reduced fringe benefits$)$costs the post office only $$10$ per hour. Union requirementslimit part$-$time labor to $25\%$ of weekly labor requirements.Formulate an LP to minimize the post offices weekly laborcosts.