Consider TCP reliable data transfer of letters A$,$ B$,$ C$,$ D$,$ and E$,$ each encoded into four bytes of data and sent in an individual segment from host X to host y $($there is no payload data traffic from Y to X$).$ The user types a new letter every $0\mathrm{.}5$ seconds. Suppose the firstsegment carrying A has SeqNumb $=45$ and ACK $=234.$ Suppose the regular one$-$way delaybetween X and Y $($and vice versa$)$ is $0\mathrm{.}5$ seconds. Suppose all exchanges take the regular delay, but the transmission of letter B from X to Y takes $1\mathrm{.}75$ seconds.A$.$ Draw the exchanged segments with SeqNumb, ACK, and carried data.B$.$ How large does the Timeout need to be to avoid retransmissions?C$.$ When is each letter delivered to the application layer at Y$?$Question $4(25$ points$)$

Consider TCP reliable data transfer of letterS $A,B,C,D,$ and $E,$ each encoded into four bytes of data and sent in an individual segment from host $x$ to host $Y($there is no payload data traffic from $Y$ to $x).$ The user types a new letter every $0\mathrm{.}5$ seconds. Suppose the first between $x$ and $Y($and vice versa$)$ is $0\mathrm{.}5$ seconds. $Y$ takes $1\mathrm{.}75$ seconds. delay, but the transmission of letter $B$ from $x$

B$.$ How large does the Timeout need to be lo applican layer at $Y?$

C$.$ When is each letter delivered to the applicalion isat