For GBN: Host A sends $9$ packets in total. Their sequence number is $1,2,3,4,5$ and resend sequence number $2,3,4,5.$

For SR: Host A sends $7$ packets in total. Their sequence number is $1,2,3,4,5$ and resend $2,4.$

For TCP: Host A sends $7$ packets in total. Their sequence number is $1,2,3,4,5$ and resend $2,4.$

Sol $2.$

For GBN: Host B sends total $7$ ACKs. Their sequence number is $3$ ACKs with $1,1,1$ and the four ACK as $2,3,4,5.$

For SR: Host B sends total $5$ ACKs. Their sequence number is $1,3,5,2,4.$

For TCP: Host B sends total $5$ ACKs. Their sequence number is $2,2,2,4,6($Because in TCP the ACK is sent with expected sequence number$)$