P1: CPU 1, I/O 6, CPU 5 P2: CPU 5, I/O 17, CPU 3 P3: CPU 7, I/O 5, CPU 3 SJF: P1: RWWWWWWrrrrrrRRRRR P2: rRRRRRWWWWWWWWWWWWWWWWWRRR P3: rrrrrrRRRRRRRWWWWWRRR Total waiting time is 13 PSJF: P1: RWWWWWWRRRRR P2: rRRRRRWWWWWWWWWWWWWWWWWRRR P3: rrrrrrRrrrrrRRRRRRWWWWWrrrRRR Total waiting time is 15