$($i$)$ Describe the difference between the slow start and congestion avoidance

phases with respect to the TCP congestion window $($cwnd$)$ value.

$($ii$)$ Give the values of ssthresh at the $13$th$,18$th$,23$rd and $28$th transmission

rounds.

$($iii$)$ Showing your working, give the transmission round number at which the

$70,000$th segment is sent.

$($iv$)$ Identify the intervals of time when a TCP slow start is operating.