Draw a data model for the following entities, considering the entities as representing a system for a patient billing system and including only the attributes that would be appropriate for this context:

. Patient (age, name, hobbies, blood type, occupation, in- surance 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)