Challenge: Black Rook vs Red Cannon: A Bold Defense Strategy in Just 3 Moves - Can you solve it?

When the Red Rook is on file 8, threatening to attack the Black General, and the Red Cannon is on file 7, ready to shoot at the Black Pawn. As the Black General, find a way to neutralize the threat using the 'Cannon Reverse' and 'Rook Block' tactics in this position!