Problem III Consider the queuing delay in a router buffer (preceding an outbound link). Suppose all packets are L bits, the transmission rate is R bits, and that N packets simultaneously arrive at the buffer every LN/R seconds. Find the average queuing delay of a packet. (Hint: the queuing delay for the first packet is zero; for the second packet L/R; for the third packet 2L/R. the Nth packet has already been transmitted when the second batch of packets arrives)