1) Blue was born deaf and mute but has a positive self-concept and views himself as able despite his disability.
2) Blue is assigned a group project with his classmate Red, who stereotypes disabled people as unable to work and looks down on Blue.
3) When Red has a problem in the bathroom, Blue helps him despite Red's previous discrimination, demonstrating altruism.
4) Red removes his stereotypes after this interaction and the two become friends through repeated exposure in their project, following the mere exposure effect.