. 120 pts.JARQ protocols onsider the ARQ protocol in Fig. 2 (a). Does this figure indicate that Stop and Wait protocol, Go-back-N, or Selective Repeat is being used? Explain your answer briety onsider the sliding window protocol Fig. 2 (b) to the right. Does this Fig.2 (b) indicate that Go-Back-N is being used, or Selective Repeat is being used? Explain your answer briefly? In Figure (b), if ack0, ackl, ack3 are all lost, what is the next event at the sender? c. Sender Receiver Sender send pkto send pkt1 send pkt2 send pkt3 ACK O send acko send ack Frame 1 ACK 1 Frame wait send ack3 ACK O . 120 pts.JARQ protocols onsider the ARQ protocol in Fig. 2 (a). Does this figure indicate that Stop and Wait protocol, Go-back-N, or Selective Repeat is being used? Explain your answer briety onsider the sliding window protocol Fig. 2 (b) to the right. Does this Fig.2 (b) indicate that Go-Back-N is being used, or Selective Repeat is being used? Explain your answer briefly? In Figure (b), if ack0, ackl, ack3 are all lost, what is the next event at the sender? c. Sender Receiver Sender send pkto send pkt1 send pkt2 send pkt3 ACK O send acko send ack Frame 1 ACK 1 Frame wait send ack3 ACK O