You are to a file composed of 7 packets, P1 to P7, from A to B using different protocols, with packet time is 1 ms, RTT is 10 ms, and timeout is 15 ms.

Draw a timing diagram showing events (transmission, reception, retransmission, etc) for the following scenarios, and show the total time used to achieve the transmission successfully.

2) Packet number 4 is lost and transmitted successfully upon retransmission using SAW. 2) Packet number 4 is lost and transmitted successfully upon retransmission using SAW