Design a relational database schema (include a diagrammatic representation) for a Conference Review System where in researchers submit their research papers for consideration in various conferences. For each conference, reviews of the research papers completed by reviewers are recorded in this database to facilitate the paper selection process. The database system caters to researchers who submit their papers for specific conferences and the reviewers who record answers to evaluation questions for each paper they review and make recommendations on whether to accept or reject the paper for a given conference. The data requirements for this system are provided below. Be sure to indicate all keys and constraints, and any assumptions you make including business rules.