FCFS Scheduling Algorithm

Arrival Time:
Process 1: Arrival Time = 0
Process 2: Arrival Time = 1
Process 3: Arrival Time = 2
Process 4: Arrival Time = 3
Process 5: Arrival Time = 4

CPU Time Needed:
Process 1: CPU Time Needed = 5
Process 2: CPU Time Needed = 2
Process 3: CPU Time Needed = 3
Process 4: CPU Time Needed = 4
Process 5: CPU Time Needed = 1

Priority:
Process 1: Priority = 1
Process 2: Priority = 2
Process 3: Priority = 3
Process 4: Priority = 4
Process 5: Priority = 5

Calculating Waiting Time:
The waiting time for each process can be calculated using the FCFS (First-Come-First-Serve) scheduling algorithm. In this algorithm, processes are executed in the order of their arrival time.

Process 1:
- Arrival Time = 0
- CPU Time Needed = 5
- Waiting Time = 0 (No other process has arrived before it)

Process 2:
- Arrival Time = 1
- CPU Time Needed = 2
- Waiting Time = 5 (Process 1 has already executed for 5 units of time)

Process 3:
- Arrival Time = 2
- CPU Time Needed = 3
- Waiting Time = 7 (Process 1 has executed for 5 units of time, and Process 2 has executed for 2 units of time)

Process 4:
- Arrival Time = 3
- CPU Time Needed = 4
- Waiting Time = 9 (Process 1 has executed for 5 units of time, Process 2 has executed for 2 units of time, and Process 3 has executed for 3 units of time)

Process 5:
- Arrival Time = 4
- CPU Time Needed = 1
- Waiting Time = 13 (Process 1 has executed for 5 units of time, Process 2 has executed for 2 units of time, Process 3 has executed for 3 units of time, and Process 4 has executed for 4 units of time)

Average Waiting Time:
To calculate the average waiting time, we sum up the waiting times of all the processes and divide it by the total number of processes.

Average Waiting Time = (0 + 5 + 7 + 9 + 13) / 5
Average Waiting Time = 34 / 5
Average Waiting Time = 6.8

Therefore, the average waiting time for the given set of processes using the FCFS scheduling algorithm is 6.8 units of time.