AP Physics Simple Harmonic Motion Question. Any help would be great!?

In preparation for shooting a ball in a pinball machine, a spring (k = 700 N/m) is compressed by 0.0700 m relative to its unstrained length. The ball (m = 0.0550 kg) is at rest against the spring at point A. When the spring is released, the ball slides (without rolling) to point B, which is 0.300 m higher than point A. How fast is the ball moving at B?