United Raiders Drive-In Market has one checkout counter where one employee operates the cash register. The combination of the cash resister and the operator is the server in this queuing system; the customers who line up at the counter to pay their selections form the waiting line. Customers arrive at a rate of 24 per hour according to a Poisson distribution, and service times are on average equal to 2 minutes per customer.

What is the average waiting time in the queue in minutes?

a.

8

b.

6

c.

5

d.

9

e.

7

I need typed answer with explanation