Suppose that we have a multiprogrammed computer in which each job has identical

characteristics. In one computation period, T, for a job, half the time is spent in I/O

and the other half in processor activity. Each job runs for a total of Nperiods.Assume

that a simple round-robin priority is used, and that I/O operations can overlap with

processor operation. Define the following quantities:

•Turnaround time to complete a job

•number of jobs completed per time period T

•Processor of time that the processor is active (not waiting)

Compute these quantities for one, two, and four simultaneous jobs, assuming that the

period T is distributed in each of the following ways:

a.I/O first half, processor second half

b.I/O first and fourth quarters, processor second and third quarters