Final answer:
The question involves operations management, particularly sequencing and scheduling jobs through machines to optimize processing time, but lacks the specific data to provide a direct answer to the student's query about job sequencing, total time elapsed, and machine idle times.
Step-by-step explanation:
The student is asking about job sequencing and scheduling in operations management, specifically identifying the optimum sequence for processing jobs through machines, as well as determining the total time elapsed and the idle time for each machine.
To determine the optimum sequence, one would typically apply sequencing rules such as the shortest processing time first, but with the data provided it is not possible to give an accurate sequence. The total time elapsed is the sum of the processing times of all jobs in the sequence plus any idle time incurred. Idle time for each machine is the time that the machine is not in use because it is waiting for a job or the previous job is still being processed on another machine.
Since we do not have actual processing times, an optimum sequence cannot be provided. However, in general, the optimum sequence minimizes the total processing time and idle time, ensuring that jobs are completed in the fastest and most efficient manner possible.