What is the implied service rate per service counter employee at an airport automobile rental counter if customer demand is $36$ customers per hour, two service counter employees are on duty, and the labor utilization is $75$ percent?

Question $36$ options:

A$)$

$18$ customers per hour

B$)$

$26$ customers per hour

C$)$

$20$ customers per hour

D$)$

$24$ customers per hour