Challenge: Red's 'Empty Cannon' Trap: Beware of the Rook on File 3, Rank 4 - Can you solve it?

Red deploys a double cannon formation, but Black's Cannon on File 2 has created a dangerous 'empty' position. Red's Rook on File 3, Rank 4 is trapped when Red's Horse on File 9 cannot intervene in time, giving Black the opportunity for a counterattack. Carefully analyze Black's 'Attack' and 'Defend' options before committing to the position.