PA $16-15($Algo$)$ Find a Doctor is a small startup that helps...

Find a Doctor is a small startup that helps people find a physician who best meets their needs $($location$,$ insurance accepted, etc.$).$ During a "slow" time for it$,$ it has $9$ staff members taking calls from customers. On average, one call arrives every $6$ minutes $($with a standard deviation of $6$ minutes$).$ Each staff member spends on average $19$ minutes with each customer $($with a standard deviation of $28\mathrm{.}50$ minutes$)$:

How long does one of their customers spend, on average, waiting on hold before he or she can start speaking to a representative?

Note: Round your answer to $2$ decimal places.

Compute time in queue

minutes