Using these givens to answer the question that follows: Arrival rate: $4\mathrm{.}0$ calls per minute, Service rate: $4\mathrm{.}4$ calls per minute. In a single$-$server model what is the average number of customers in the system?

$5\mathrm{.}26$

$47\mathrm{.}4$

$33\mathrm{.}17$

$10\mathrm{.}0$

$22\mathrm{.}75$

$13\mathrm{.}33$

$18\mathrm{.}678$

$4\mathrm{.}78$

$3\mathrm{.}76$

$38\mathrm{.}235$