Using values 6 8 9 4 3 2

FCFS
RRRRRRwwwwwwwwrRRRRRRRRR
rrrrrrRRRRwwwRR
1 6 3.5 0.87500

SJF
rrrrRRRRRRwwwwwwwwRRRRRRRRR
RRRRwwwrrrRR
4 3 3.5 0.77778
types are 4 and 1

PSJF
rrrrRRRrrRRRwwwwwwwwRRRRRRRRR
RRRRwwwRR
6 0 3.0 0.72414
types are 12 and 0

RR 3
RRRrrrRRRwwwwwwwwRRRRRRRRR
rrrRRRrrrRwwwRR
3 6 4.5 0.80769

a)FCFS: 
  CPU Utilization: 21/24
  Process 1 waiting time: 1
  Process 2 waiting time: 6
  Average waiting time: 3.5
  Process 1 end time:    24
  Process 2 end time:    15

b) SJF: 
  CPU Utilization: 21/27
  Process 1 waiting time: 4
  Process 2 waiting time: 3
  Average waiting time: 3.5
  Process 1 end time:    27
  Process 2 end time:    12

c) PSJF: 
  CPU Utilization: 21/29
  Process 1 waiting time: 6
  Process 2 waiting time: 0
  Average waiting time: 3.0
  Process 1 end time:    29
  Process 2 end time:     9

d) RR: 
  CPU Utilization: 21/26
  Process 1 waiting time: 3
  Process 2 waiting time: 6
  Average waiting time: 4.5
  Process 1 end time:    26
  Process 2 end time:    15