Your good friend Jake comes to you because he is fighting with his roommate, Justin, about how he never contributes to cleaning. The situation has gotten so bad that mold is collecting on the dirty dishes, the floor is covered in dust bunnies, and rats are roaming rent free. On top of this, Jake doesn't think Justin is a good human in general. Using Fisher and Ury's Principled Negotiation, detail how Jake should approach confronting his roommates.