GATE 2004 CPU scheduling PYQ

GATE 2004

Consider the following set of processes, vvith the  arrival times and the CPU-burst times given in  milliseconds 

Process

Arrival Time

Burst Time

P1

0

5

P2

1

3

P3

2

3

P4

4

1

What is the average turnaround time for these  processes vvith the preemptive Shortest  Remaining Processing Time first (SRPT)  algorithm? 
(a) 5.50 
(b) 5.75  
(c) 6.00 
(d) 6.25