Using these givens to answer the question that follows: Arrival rate: $2\mathrm{.}4$ calls per minute, Service rate: $2\mathrm{.}5$ calls per minute. In a singleserver model what is the time in the system $($Minutes$)?$

$22\mathrm{.}75$

$4\mathrm{.}78$

$38\mathrm{.}235$

$10\mathrm{.}0$

$5\mathrm{.}26$

$1200$

$33\mathrm{.}17$

$3\mathrm{.}76$

$18\mathrm{.}678$

$13\mathrm{.}33$