Jack Insurance leases a copying machine for $45 per day that is used by all individuals at their office. An average of five persons per hour arrives to use this machine, with each person using it for an average of eight minutes. Assume the interarrival times and copying times are exponentially distributed.

On average, how many people will be waiting to use the copy machine?

A. 1.333

B. 0.333

C. 0.666

D. 1.666