Explain one inheritance and one aggregation relationships existed in this UML .

PartTime Professor Teaching Assistants FullTime Professor - salary - Credit Hour - NumOfWeeks - HourRate salary - Hours - HourRate - University Country Qualification - experience Years - salary - overtime - tax + set_salary(CreditHour NumOfWeeks * HourRate) + get_salary(CreditHour * NumOfWeeks HourRate) + to Stringo + set_salary(Hours * HourRate) + get_salary(Hours Hour Rate) + to String Extends- - set_University Country +get_University Country + set_Qualification() -get_Qualification() + sel_experience Years() -get_experience Years() - set_salary(salary - salary lax + overtime) -get_salary(salary - salary * tax + overtime) toStringo Extends Extends Department Person Student Address - Department Number - Studenti -name - address - contactNumber - ID CardNumber DateOfBirth - Street - buliding Number - apartment Number - postalCode + set_DepartmentNumber) +gel_DepartmentNumber + set_StudentID) get_Studenti Section Course - name String - CreditHour int deprtment. Deprtment CourseNumber int - prerequisites: list sections: list