Hey, I need help with this physics question... bullets anyone!? 10 POINTS!?

6- A ballistic pendulum, as shown in the figure, was a device used in the past century to measure the speed of bullets. The pendulum consists of a large block of wood suspended from long wires. Initially, the pendulum is at rest. The bullet strikes the block horizontally and remains stuck in it. The impact of the bullet puts the block in motion, causing it to swing upward to a height h. If the bullet has a m of 9.80 g, and the block of m 5.40 kg swings up to a height of h = 11.000 cm, what was the speed of the bullet (in m/s) before impact? Hint: Use conservation of momentum for the collision, then conservation of energy.