Consider the following figure of TCP congestion control behavior: 45 TH 10 cend size (segments) 40 10 9 35 15 10 5 Number of RTTS 15 25 1) What is the TCP congestion control version used? 2) show on the graph or numerically the slow start phase. 3) show on the graph or numerically the congestion avoidance phase. 4) At which RTT did the first multiplicative decrease in congestion window take place. What caused this behavior (triple duplicate ACK or an expired timer (RTO))? 5) What are the different values that ssthreshold holds from RTT 5 to RTT 25? Explain the reason resulting in these values.