Design an ER diagram for the following Dental Clinic database. Your diagram should have all the needed details. You may make any reasonable assumptions but you have to state them clearly. The clinic has several dentists. Each dentist lias a unique Number, name, nationality, multiple room-number, salary, birth-date and home-address (Box, City, Zip). Each client (patient) has a unique Code, name, home-phone, work-phone, address, and birth-date. Each client is assigned to one dentist. All future visits will be to tire same dentist. A client can be insured or self-paying. An insured client should have an insurance company-name, and company-Phone, while a self-paying client must have a bank-name and a bank account. Each visit of a client is described by a date, type, action, fee, and date-of-next-appointment 1. Design an Entity Relationship (ER) Model to represent the above requirements. 2. Convert an ER Diagram that presented in part (A) to Rational Schema