In a three server set$-$up$,$ three separate lines form, each line handled by an individual server. The average arrival rate for each server is $11$ customers $\frac{?}{hr},$ while the average service rate $=13$ customers $\frac{?}{\text{p}\text{e}\text{r}\text{h}}\frac{r}{p}er$ server. What would be the approximate average # customers in line if they switch to a single pooled line that uses all $3$ servers at the same time? $($Use 'Multiple Servers, Ave. # in Line' Table. Answer is NOT $5\mathrm{.}26$ or $4\mathrm{.}82)$

Answer Choices:

A$)4\mathrm{.}43$

B$)4\mathrm{.}13$