Given the data provided in the table below, what will the marginal cost equal for production at quantity $(Q)$ level $4?$

$\backslash$table$[[$Q$,$P$,$TC$,$TR$,$MR$,$MC$,$Profit$],[0,$$$5,$$$9,,,,],[1,$$$5,$$$10,,,,],[2,$$$5,$$$12,,,,],[3,$$$5,$$$15,,,,],[4,$$$5,$$$19,,,,],[5,$$$5,$$$24,,,,],[6,$$$5,$$$30,,,,],[7,$$$5,$$$45,,,,]]$

$$ $$5\mathrm{.}00$

$$4\mathrm{.}00$

$$1\mathrm{.}00$

$$3\mathrm{.}00$