Library-db

Me and my team made a database using MySQL, hosting a library.
This library contains a variety of media, including books, movies and games.
Books have a title, author, genre and language.
Movies have a title, director, genre, language and age restriction.
Games have a title, genre and age restriction.
The library employs a librarian, who has a name, id and salary. The librarian can add new media or remove old media from the library.
The library lets users, defined by a name, user id and birth date, use the library.
The users can make a rent agree- ment, enabling them to rent media, which they have to return before a given return date. If they fail to do so, they will be given a fine, with a certain price.