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Consider a TCP congestion control scheme that uses the slow-start and congestion avoidance schemes with a slow-start threshold ssthresh = 8 and a round-trip delay of 1 time unit. (This means that if an ACK is not received 1 time unit after a segment is transmitted, a retransmission of the segment will be take place.) Assume that ACKs are received within the timeout period up to the 4^th time unit and after that time a timeout occurs. Plot the growth of the congestion window (cwnd) up to the 8^th time unit