Given three jobs, A$,$ B$,$ C which take $200,100,$ and $300$ units of time to complete. They arrive at the scheduler at very close to the same time, so that the scheduler can choose the ordering of the jobs simultaneously.

$$ with the FIFO scheduler, the jobs are run in alphabetical order, what is the average turnaround time? what is the average response time?

ATAT $=200+100+300/3=200$ units and ART time should be $0$ for the first job.

$$ with the SJF scheduler, what is the average turnaround time? What is the average response time?

ATAT $=100+200+300/3=200$ units and ART should be $0$ for the first job.