Draw an ERD for the following situation. If you believe that you need to make additional

assumptions, clearly state them for each situation.

Each publisher has a unique name; a mailing address and telephone number are also kept

on each publisher. A publisher publishes one or more books; a book is published by exactly

one publisher. A book is identified by its ISBN, and other attributes are title, price, and

number of pages. Each book is written by one or more authors; an author writes one or

more books, potentially for different publishers. Each author is uniquely described by an

author ID$,$ and we know each author's name and address. Each author is paid a certain

royalty rate on each book he or she authors, which potentially varies for each book and for

each author. An author receives a separate royalty check for each book he or she writes.

Each check is identified by its check number, and we also keep track of the date and amount

of each check.