Problem statement: University has two types of students. BS students and MS students. MS students can be further categorized in MS-by-research and MS-by-coursework Students. All the students have their names, addresses and roll-numbers stored. Each MS student has an advisor. MS-by-research student has a thesis status (whether he has started the thesis or not). Thesis comprises of Chapters, where chapter have number and title to be stored. MS-by-coursework student have number of credit hours passed to be stored. BS student can be of first year, second year, and third year or fourth year. The advisor could be either Lecturer or an Assistant Professor. Lecturer will have a subject as a specialty while Professor has research interest in particular research fields. In addition to that, advisor could be either HEC approved or locally approved. The approval status of the advisor also needs to be stored. To have all information of each particular category of students, a "PrintInfo()" operation should be there.  Design the class hierarchy for the university students.  For this, you need to identify the following from the given case study •Classes/objects •Attributes against each class/object •Operations against each class/object •Type of association (association, aggregation, composition or inheritance) between classes/objects After identifying the above, you need to make an object model. Your design should be such that which can be used to declare a list of students and advisors belonging to different categories