Consider an M$/$M$/1$ queuing system with a disk subjected to I$/$O requests arriving at an average rate of $\backslash$lambda

requests$/$sec$.$ It was observed that on average, there was about $5$ requests waiting for service in the queue

and that each request waits in the queue for about $10$ msec, on average. What is the arrival rate $\backslash$lambda for this

disk?