CPU on Demand offers real time high perfomance computing services. CPUD owns 1 supercomputer that can be accessed through the internet. Their customers send jobs that arrive on average every 3 hours. The standard deviation of the interarrival time is 5 hours. Executing each job takes on average 2 hours on the supercomputer and the standard deviation of the processing time is 3.8 hours.

How long does a customer have to wait to have a job completed? ____ hours