(15 pts) 2. Suppose there is one packet switch between a source and destination. The transmission rate between source and switch is Ri, and the rate between switch and destination is R2 L bits per packet destination source R1 bps R2 bps (4 pts) (2.1) Assume the switch uses store-and-forward packet switching, suppose a packet with length L is transmitted from source to destination, what is the transmission delay from source to destination? (4 pts) (2.2) What is the transmission delay from source to destination if we have 4 packets with length 1 to be transmitted? (Assume R1 R2 R). How about N packets, what is the transmission delay, 3 pts) 2.3) What is the transmission delay of sending P packets (each packet's length L) over M Links of transmission rate R. pts) (2.4) Consider sending a packet from source to destination over a fixed route. the delay component in the end-to-end delay. Which of these delay are constant which are variable