2. Draw a data model for the following entities, con- sidering the entities as representing a system for a patient billing system and including only the attrib- utes that would be appropriate for this context Patient (age, name, hobbies, blood type, occupation, insurance carrier, address, phone) Insurance carrier (name, number of patients on plan, address, contact name, phone) Doctor (specialty, provider identification number, golf handicap, age, phone, name)