CPU-on-Demand (CPUD) offers real-time high-performance 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 times is 6 hours. Executing each job takes on average 2 hours on the supercomputer and the standard deviation of the processing time is 3.5 hours. (Round your answer to 1 decimal place.) How long does a customer have to wait to have a job completed? hours