Question 9 N.B: Don't forget to draw graph and show exactly all these steps (i) Draw schematically the dependence of the congestion window W. (in kilobytes) on the transmission time t (in the RTT units) for congested internet assuming the following scenario: At t = 33RTT the first three duplicate ACKs have been received by the sender host before the RTO. After this another three duplicate ACKs were received at t=67 RTT, and then at t = 75 RTT the first RTO of the sender's acknowledgement clock has occurred. Between t= 75 RTT and t = 85 RTT the network operates without disruptions. You need to draw the dependence for a time interval between t=0 and t=85 RTT and explain in detail each stage of the congestion window evolution. Assume that at t=0 the first packet loss took place due to the RTO and the initial window size is set to W = MSS = 1 kilobyte. The slow-start threshold for a fully open congestion window is SST = 64 kilobytes. (ii) Consider that in the case from part (i) at t=85 RTT the receiver reports to the sender that its receive window is W = 30 kilobytes, and W, is kept at this value in the following transmissions. Find how long it will take (beginning from t=85 RTT) before the full window will be sent. Your answer should be in units of RTT. [70%] [30%]