Answer:
Option B Zone of non service
Step-by-step explanation:
We can decide whether it will be one of each zone mentioned above by identifying whether the service rate is greater than the arrival rate or vice versa.
Zone of service = Service rate is greater than the mean arrival rate
Critical zone = Service rate equals to mean arrival rate
Zone of non service = Mean arrival rate is greater than the service rate
Calculation
Capacity utilization rate = Arrival rate / Number of customers they can serve
Capacity utilization rate = 126 / 121
Capacity utilization rate = 104%
Since the mean arrival rate is greater than the service rate Its would be a Zone of non service