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 and , what proportion of entering customers completes their service with server 2?