For a timesharing system with two disks (user and system), the probabilities for jobs completing the service at the CPU were found to be 0.75 to disk A, 0.15 to disk B, and 0.1 to the terminals. The user think time was measured to be 5 seconds,the disk service times are 30 milliseconds and 25 milliseconds,while the average service time per visit to the CPU was 40 milliseconds.
Using the queueing network model shown in Figure 32.8 answer the following for this system: