1 3
2 4
3 5
4 2

- CPU 1
job 1 : 1~3 sec(Process time 3 sec = Total 3 sec
job 3 : 4~8 sec(Queue time 1 sec + Process time 5 sec = Total 6 sec)

- CPU 2
job 2 : 2~5 sec (Total 4 sec)
job 4 : 6~7 sec(Queue time 2 sec + Process time 2 sec = Total 4 sec)