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a ) Design a class named MyDate. The class contains: The data fields year, month, and day that represent a date ( month is an

a) Design a class named MyDate. The class contains:
The data fields year, month, and day that represent a date ( month is an integer, i.e.,0 is for January).
A no-argument constructor that creates a MyDate object for the current date.
A constructor that constructs a MyDate object with a specified elapsed time since midnight, January 1,1970, in milliseconds.
A constructor that constructs a MyDate object with the specified year, month, and day.
Three getter methods for the data fields year, month, and day, respectively.
A method named setDate(long elapsedTime) that sets a new date for the object using the elapsed time.
b) Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A person has a name, address, phone number, and email address. A student has a class status (freshman, sophomore, junior, or senior). Define the status as a constant. An employee has an office, salary, and date hired. Use the MyDate class defined in a) to create an object for date hired. A faculty member has office hours and a rank. A staff member has a title. Override the toString method in each class to display the class name and the person's name. Draw the UML diagram for the classes and implement them. Write a test program that creates Student, Employee, Faculty, and Staff polymorphically and invokes their toString() methods.
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