Consider sending a large file from host A to host B over a TCP connection that has no loss.

a) Suppose these hosts use additive-increase, multiplicative decrease (AIMD) for their congestion control. Host A has already transitioned to congestion avoidance mode. Assume the RTT values are approximately constant. At time t = 0, Host As cwnd = 6 MSS. In terms of RTT, how long does it take for Host A to increase its cwnd to 12 MSS?

b) What is the average throughput (in terms of MSS and RTT) for this connection from t = 0 up through t = 6 RTT?

c) After sending all its data after t = 6 RTT, host As timer expires while waiting for the next acknowledgment. To what multiple of the MSS will host A set its congestion window after this expiration?

d) This timer expiration transitioned host A back to slow start mode. At what size of congestion window will host A transition back to congestion avoidance mode given its congestion window when it timed out?

Hey this is for my networking class. Please explain I don't understand how to answer these questions. Thank you so much.