What Is the Implied Service Rate Per Service-Counter Employee at an Airport

Multiple Choice

What is the implied service rate per service-counter employee at an airport automobile rental counter if the customer demand is 36 customers per hour, two service-counter employees are on duty, and their labor utilization is 90%?

A) More than 10 but less than or equal to 12 customers/hour/employee
B) More than 12 but less than or equal to 14 customers/hour/employee
C) More than 14 but less than or equal to 16 customers/hour/employee
D) More than 16 customers/hour/employee