Consider single-server Q with LIFO (last-infirst-out) services. Suppose that three customers show up at times 5, 6, and 8, and that they all have service times of 4. When does customer 2 leave the system? a. 3
b. 9
c. 13
d. 17
e. 19a

d. 17

Explanation:

The computation is shown below;

Here the time started i.e. t=0

Therefore there was no customer upto t=5 hour

At t=5

The client first came and as there was no other customer available so we begins service to customer 1

Now  

As service off is 4 hour so service to client 1 will end at

t=9 hour.

Also mid-time at t = 6

That means the client 2 came and at t = 8 the  client 3 came.

Now at t = 9 the service begins for client 3 and end at t = 13 ( 9 + 4)

At t=13 hour, so after four hours it should be 17  

d) social security number

let me know if i am correct or not, so i can edit the answer.

anyone below or above ambitious can tell you. so crowns mean brainliest. getting brainliest means your answer needs a good explanation and the person asking the question can understand your answer easily. so say there's a multiple choice question. you don't just want to say your answer is a, hope it . provide evidence and reasoning so that they know that that is the correct answer. a good explanation should have evidence, good reasoning, and your opinion on why you picked that. you don't want to look up their question on the internet and see if you can answer it. pick questions that you 100% know the answer to, so than that way you can provide a better explanation.

best of luck,

the divergent