2 [10 points]: Consider a Go-back-N protocol with window size N = 2 and assume that 2 bits are used for the sequence number field. The sender has four packets to send to a receiver over a network, but something goes wrong with the transmission of the first, second, and fourth packets the first time they are sent: The first packet and the ACK for the second packet are lost, while the fourth packet is corrupted by the network. All other packets are sent, received, and ACK'd correctly. Draw two parallel timelines showing the sequence of events that at occur at the sender and receiver, respectively Indicate the sequence numbers associated with each of the packets sent across the channel. Show the state of the sender window after each event