Q$2$: Suppose A and $B$ create a TCP connection and start exchanging data. Assuming that the connection is established, and the window size is five, where A sends five packets $,100,500$ bytes, respectively$)$ starting with a sequence number of $2000.$ B$\text{'}$s sequence number at that time was $700.$ In the diagram below, fill in the SEQ number for each segment transmitted by A and the ACK field for each acknowledgment sent by $B$ as shown.

At the moment marked with $?$ will A transmit any packet?

If so$,$ what will it transmit? $($Provide the SIZE of the packet and the SEQ for that packet.$)$ Why?