$\backslash$table$[[$Labor Demand Data,Labor Supply Data,,,$],[$Employment$,$Toatal Product,Product Price,Employment,Wage Rate$],[0.,0,$$$2\mathrm{.}20,0,--],[1,15,2\mathrm{.}00,1,$$$1\mathrm{.}00],[2,28,1\mathrm{.}80,2,2\mathrm{.}00],[3,{?}^{39}1,1\mathrm{.}60,3,3\mathrm{.}00],[4,48,1\mathrm{.}40,4,4\mathrm{.}00],[5,55,1\mathrm{.}20,5,5\mathrm{.}00],[6,60,1\mathrm{.}00,6,6\mathrm{.}00]]$

The table shows labor demand data on the left and labor supply data on the right. How many workers will this profit$-$maximizing firm choose to emplov?

$($A$)5$

$3$

$4$

$($D$)6$

Question $10$