Question: A library maintains a database about its books. Information kept on each author includes the author's name and country of origin. Information kept on each book includes the ISBN, title, publisher, and subject. Authors and books are the entities in this enterprise, and "writes" is a relationship between these entities. Sketch an E-R diagram for the enterprise. In the absence of any business rules, what must be assumed about the binary relation "writes" regarding whether it is one-to-one, one-to-many, and so on.