Consider the following processes, with the arrival time and the length of the CPU burst given in milliseconds. The scheduling algorithm used is pre-emptive shortest remaining-time first.
Process
|
Arrival Time
|
Burst Time
|
P1
|
0
|
10
|
P2
|
3
|
6
|
P3
|
7
|
1
|
P4
|
8
|
3
|
The average turn-around time of these processes is_______ milliseconds.