22 Complete the following diagram to show how a sliding window handles a "Go back N" ARQ scheme using RR and REJ. The window is of size 4 and FI is lost. Show the ACK responses and the frames sent by A to B assuming there are no more errors, after the one shown, until a total of 6 frames are sent and correctly received and acknowledged. The ACK for the 7th frame is then lost. Complete the diagram to show the flow of messages and ACKs until A receives a subsequent ACK from B in response to a query from A of RR with P bit-1. FO Fl F2 F3 -X RRI time F4 c) Would selective reject be a better scheme to use? Explain your