Question 4 Queuing Delay (20 points) For a network router, there are 60 packets received in every 5 seconds. All packets are stored in a first-in first-out (FIFO) buffer in the router for sending out. The data rate is Rs 9.6kb/s and packet length N 512 bits 1) What are the average number of packets waiting in the buffer ? 2) What is the delay of a packet between its arriving at and being sending out from the buffer ? (hint: the delay includes the queuing delay plus the packet sending time) 3) Describe how the queuing delay varies with Ro and N