(a) A medical clinic uses objects of the class Patient to assign a priority and a doctor to a patient. Some of the attributes required in the class are listed in the table. Attribute | Data type | Description PatientID | STRING | Unique identifier of the patient Name | STRING | Patient's full name, surname first DoctorID | STRING | ID of doctor administering treatment Treatment is prioritised with a numeric scale of 1 to 5. Complete the class diagram for Patient, to include: • attribute and data type for the date of birth • attribute and data type for the priority • methods to assign the patient ID, priority and doctor ID • methods to return the patient ID, patient date of birth and the priority. [Incomplete Class Diagram for Patient]

1. (a)A medical clinic uses objects of the class Patient to assign a priority and a doctor to a patient. Some of the attributes required in the class are listed in the table. Attribute | Data type | Description PatientID | STRING | Unique identifier of the patient Name | STRING | Patient's full name, surname first DoctorID | STRING | ID of doctor administering treatment Treatment is prioritised with a numeric scale of 1 to 5. Complete the class diagram for Patient, to include: • attribute and data type for the date of birth • attribute and data type for the priority • methods to assign the patient ID, priority and doctor ID • methods to return the patient ID, patient date of birth and the priority. [Incomplete Class Diagram for Patient][5]
2. (b)(i)Identify the object-oriented programming (OOP) term described as 'an occurrence of an object'.[1]
3. (b)(ii)Describe what is meant by the OOP term polymorphism.[2]