Shine movie soundtrack?

In the movie shine, there is a scene where David and his dad go home after the competition where David played the Heroic polonaise. A sad music plays in the background, I have checked the credits but I couldn't find a piano concerto-ish piece.

In the scene which David and his father go to Ben Rosen's house, a sad music plays. I couldn't find it either.

Where David tells his professor he wants to play the Rach 3, there is a music in the background, a stringed instrument plays a piece.

Could you tell me those pieces names?