Consider the Go-Back-N (GBN) and Selective Repeat (SR) protocols with a sender window size of 4 and a sequence number range of 1024. For each of these protocols, describe what happens for the...

Consider the Go-Back-N (GBN) and Selective Repeat (SR) protocols with a sender window size of 4 and a sequence number range of 1024. For each of these protocols, describe what happens for the following cases:
a) The first packet in the sender window size is lost before reaching the destination.
b) All transmitted packets reached the destination except the third one.
c) Only the first and last packets in the sender window size reached the destination.
d) Only the ACKs of the first and last packets, in the sender window size, reached the destination.