43. Customers arrive at a two-server service station according to a Poisson process with rate . Whenever

43. Customers arrive at a two-server service station according to a Poisson process with rate λ. Whenever a new customer arrives, any customer that is in the system immediately departs. A new arrival enters service first with server 1 and then with server 2. If the service times at the servers are independent exponentials with respective rates μ1 and μ2, what proportion of entering customers completes their service with server 2?