CPU Scheduling - General Questions

Using Round Robin (quantum 2) scheduling, what is the average waiting time for these processes (all arrive at time 0, in order)?

Process  Burst
P1       5
P2       4
P3       9

Using FCFS scheduling, what is the average waiting time for these processes (all arrive at time 0, in order)?

Process  Burst
P1       9
P2       10
P3       5
P4       6

Using FCFS scheduling, what is the average waiting time for these processes (all arrive at time 0, in order)?

Process  Burst
P1       5
P2       10
P3       10
P4       7

Using Round Robin (quantum 2) scheduling, what is the average waiting time for these processes (all arrive at time 0, in order)?

Process  Burst
P1       10
P2       8
P3       2
P4       8

Using SJF (non-preemptive) scheduling, what is the average waiting time for these processes?

Process  Arrival  Burst
P1       0        8
P2       2        10
P3       4        6
P4       0        5