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 6 hours. The standard deviation of the interarrival times is 4 hours. Executing each job takes, on average, 3 hours on the supercomputer and the standard deviation of the processing time is 4.0 hours. (Do not round intermediate calculations. Round your answer to 1 decimal place.) How long does a customer have to wait to have a job completed? hours HINT: the amount of time the customer waits for the job to come back includes the waiting time of the job and the processing time of the job