A routing algorithm operates as follows: A packet is forwarded via its first choice link, if and only if there are no other packets in the queue and the link is idle. Otherwise it uses a second choice link. There are no other options. By considering the arrival rate and service times associated with a particular destination, what proportion of these packets are routed via their first choice? t-like previous question - it is not a proof but rather a rephrase of the question to find the answer. Read off notes.]