Can you please explain how to get the answer? (answer is provided)

Can you please explain how to get the answer? (answer is provided)

Question 61 Assume the following processes, each with their arrival time and burst time. Process Arrival Time Burst Time P1 0.0 6 P2 2.0 2 P3 4.0 1 P4 6.0 3 P5 7.0 3 1- For FCFS job scheduling, the average waiting time is....... (put your answer in the first blank) 2- For SJF (Non-Preemptive) job scheduling, the average waiting time is... (put your answer in the second blank) 3- For the FCFS or SJF (Preemptive), the average burst Time is....(put your answer in the third blank) 4- For the FCFS, what is the average Total Time? such that the Total time is the sum of the Waiting time and the Burst Time, (put your answer in the forth blank) 5- For the SJF (Non-Preemptive), what is the average Total Time? such that the Total time is the sum of the Waiting time and the Burst Time, (put your answer in the fifth blank) Hint: Write your answer with one decimal point (for example 5.1, 5.0) DONOT LEAVE ANY SPACE IN YOUR ANSWER Answer for blank # 1: 3.2 (20%) Answer for blank # 2: 3.0 (20%) Answer for blank # 3: 3.0 (20%) Answer for blank # 4: 6.2 (20%) Answer for blank # 5: 6.0 (20%)