can you help me out with this information? got stuck with these few items

 

 

A computer with a single CPU, i.e. one core, has to process 5
batch processes, A through E. Suppose their estimated
running times are 10, 6, 2, 4, and 8 minutes respectively,
e.g. process A is estimated to take 10 minutes to complete.
If the priority system is first come – first served, at what
times will each process be finished? A computer with a single CPU, i.e. one core, has to run 5
batch processes, A through E. Suppose their estimated
running times are 10, 6, 2, 4, and 8 minutes respectively,
e.g. process A is estimated to take 10 minutes to complete,
B takes 6 minutes, etc.
If the priority system is round robin, at what times will each
process be finished? What is the CPU utilization if there are 4 processes running
at the same time, and on average the CPU spends 20% of its
time waiting on I/O completion?
Using the CPU utilization formula on page 96, solve the
following problem. Suppose the CPU has to wait 40% of its
time on I/O completion, and there are two processes that
need to run: A and B. If A and B takes 10 minutes each of
CPU time, then how long will it take for them to run
sequentially? How much time in parallel?

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• 1493887788-A computer with a single CPU.docx