:Consider we have a cellular network base station with one server $($M$/$M$/1)$ serving mobile devices. The average time between arrivals of mobile devices to the base station follows an exponential distribution with a mean inter arrival time of $10$ seconds. The average service time for each mobile device $($the time it takes for the base station to handle a request$)$ aiso follows an exponential distribution with a mean service time of $8$ seconds, Find the average number of mobile devices in the system lincluding those being served and those waiting in the queue$),$ as well as the average time a mobile device spends in the system $($waiting time plus service time$).$