The source Host A is going to send 5KB (5120byte) of data to the destination Host B over an established TCP connection, which has a window size (rwnd) of 4KB (4096byte) and a maximum segment size (MSS) of 1KB (1024byte). Assuming Go-Back-N is used in TCP. Suppose there are errors in the transmissions. For each of the following independent transmission error cases, please calculate the total number of segments sent out from the source (including retransmissions) in order to complete the transmissions of the 5KB data to the destination.

Case A. The 2nd segment is corrupted. Other transmissions are fine. What is the total number of segments sent out from the source (including retransmissions)?

Case B. The 2nd segment is correctly received, but the ACK to the 2nd segment is lost. Other transmissions are fine. What is the total number of segments sent out from the source (including retransmissions)?
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Case C. The 4th segment is lost. All other transmissions are fine. What is the total number of segments sent out from the source (including retransmissions)?

Case D. The 5th segment is lost. All other transmissions are fine. What is the total number of segments sent out from the source (including retransmissions)?

Case E. The 5th segment is correctly received, but the ACK to the 5th segment is lost. Other transmissions are fine. What is the total number of segments sent out from the source (including retransmissions):