The following figure shows an ER diagram for a publisher. Transform the ER diagram to a set of relations and develop a relational schema. b. Show the primary keys, foreign keys and referential integrity constraints. See the example below about how to specify the elements of your relational model verbally. You need to write down the following Information Example: Customer Customerid PK. Address, City, State. Zip) ORDER (Orderid PK. Date. Customerid FK) Customer in order t references Custoemrio in Customer t ROYALTY CHECK Check No Check Date Check Amount BOOK Book ISBN PUBLISHER Pub Name Pub Mailing Address Pub Phone Publishes Book Title AUTHOR Author ID Writes_Author Name Author Address Book Price Book Nbr Pages ROYALTY RATE A B / 5 E 3 2 X2