Waiting in a Queue

You have n requests in a queue, and each request has distinct owner. That is, there are n owners, and each of them own exactly one of the requests. The requests are numbered from 1 to n, and they are initially in order in the queue. That is, Request 1 is at the head (beginning) of the queue, and Request n is at the tail (end). The process starts at time = 1, ie. the first minute. But not all the o