In a batch operating system, three jobs are submitted for execution. Each job involves an i/o activity, cpu time and another i/o activity of the same time span as the first. Job job1 requires a total of 23 ms, with 3 ms cpu time; job2 requires a total time of 29 ms with 5 ms cpu time; job3 requires a total time of 14 ms with 4 ms cpu time. Illustrate their execution and find cpu utilization for uniprogramming and multiprogramming systems. Here cpu utilization is defined as ratio total execution time by cpu execution time.