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Question 1)

Process No.              AT(Arrival Time)               BT (Burst Time)

P1                                    0                                         4
P2                                    1                                         3
P3                                    2                                         1
P4                                    3                                         2
P5                                    4                                         5

Solution:- First Create a Gantt chart.Here given a Process

Criteria :- Arrival Time
Mode :- Non-Preemptive

Here P1 process is starting time 0 and completion time is 4 because 4 is burst time.

Then,P2 starting time is 4 and completion time is 7 because 4+3=7 and 3 is a burst time of P2

Next , P3 is starting time is 7 and completion time is 8, because 7+1=8 and 1 is burst time of P3

Same here apply condition on P4 and P5.

Then,Next find out completion time , Turn around time , Waiting time and Average Waiting time.

CT = Completion time
TAT= Turn Around time
WT= Waiting time
AWT= Average Waiting time

CT :-
P1= 4
P2= 7
P3= 8
P4= 10
P5= 15

TAT:-
Formula :- TAT = CT - AT

TAT (P1) = 4 - 0 = 4
(P2) = 7 - 1 = 6
(P3) = 8 - 2 = 6
(P4) = 10 - 3 = 7
(P5) = 15 - 4 = 11

WT :-
Formula :-  WT = TAT - BT

WT(P1) = 4 - 4 = 0
(P2) = 6 - 3 =3
(P3) = 6 - 1 =5
(P4) = 7 - 2 =5
(P5) = 11 - 5 = 6

AWT (Average Waiting time):-

( 0 + 3 + 5 + 5 + 6 ) /5  = 19 /5  =  3.8

Processes      AT              BT                 CT                    TAT                   WT

P1               0                  4                   4                         4                     0
P2               1                  3                   7                         6                     3
P3               2                  1                   8                         6                     5
P4               3                  2                   10                       7                      5
P5               4                  5                   15                       11                     6