Mens Barberic Cuts $($MBC$)$ services four customers between $1$ and $2$ p$.$m$.$ on a warm Monday afternoon. During this hour, Jose is the only barber serving these customers without taking a break. One of Jose's colleagues had called in sick, another was on vacation, and yet another one was out on a lunch break. The waiting line of these customers does NOT follow a M$/$M$/1$ model and Jose serves one customer fully before moving on to the next. The arrival, service, and end times for these customers are listed below.

Customer Name

Arrival Time

Service Time

Service Ends

Joe

$1$ p$.$m$.$

$10$

$1$:$10$ p$.$m$.$

Jake

$1$:$08$ p$.$m$.$

$12$

$1$:$22$ p$.$m$.$

James

$1$:$17$ p$.$m$.$

$8$

$1$:$30$ p$.$m$.$

Julius

$1$:$45$ p$.$m$.$

$11$

$1$:$56$ p$.$m$.$

Given the aforementioned information, what is the average time a customer spends at MBC from arrival to completion of service?

Group of answer choices

A little over $10$ minutes

$90$ seconds

$11\mathrm{.}75$ minutes

$56$ minutes