Cold Bone is a neighborhood ice-cream truck that is staffed by one employee. The utilization of this employee is less than 100%, i.e., demand for ice-creams is smaller than the capacity of this employee to serve ice-creams. In other words, the employee has spare capacity. There is, of course, variability in both customer arrivals and service times. Which of the following statements is true?

Group of answer choices

Since the staff member has idle time, no customer will wait for service

Since there is variability, every customer will wait for service

Some customers will wait for service and some will not.