System 1 is better in terms of the expected number of customers in system. System 1 has handle up to three servers concurrently.
A queue (or waiting line) forms anytime there are more units in the system than the service facility can handle at once in a queuing system, which is characterized by a system with a service facility at which units of some kind (often referred to as "customers") arrive for service.
First in, first out (FIFO) refers to the practice of serving clients in order of arrival, starting with the one who has waited the longest. The most typical kind of queue discipline is this.
The customer with the shortest wait time is attended to first under the last in, first out (LIFO) alternative to FIFO.
To learn more about queuing system refer to:
https://brainly.com/question/14555199
#SPJ4
