Write a java program Create an Abstract class Student that contains a method take exam, implement the method in the child classes PhdStudent and GradStudent in which PhdStudent takes exam by giving his final defense presentation while the graduate student gives a written paper.

Write a java program that has:A class University that has:- Three private instance variables named firstName, lastName, and id- A constructor to initialize the three instance variables- A toString method to return: “Welcome,” + firstName +” “ + lastName + “Your ID is ” + id- AccessorsA subclass Employee that has:- Five additional private instance variables named department, rate, bonus, hours, and salary- An appropriate constructor to use constructor of superclass in defining those of the subclass- A method named compteSalary ( ) to return salary- A method named computeBonus ( ) to return bonus- Accessors A subclass Staff that:- Overrides computeBonus ( ) such that if hours are greater than 40, there will be %10 bonus for each additional houradded to salary- Overrides compteSalary ( ) such that salary = (rate * hours) + bonus- Overrides toString method to add department and salary into the outputA subclass Faculty that:- Overrides computeBonus ( ) such that if hours are greater than…

USING JAVA Write these: An interface called Shape that has two methods: area and perimeter. A class Rectangle that implements Shape and has a length and a width. A class Circle that implements Shape and has a radius. For each class, write the needed constructors, getters, setters, and a toString method that stringifies the instance variables in a readable format. Supply a test program that instantiates an instance of each class and exercises each method defined for the class.

Add the following methos to the class Person(code bellow) in Python: a) Add a method isDescendant(personID) to Person which takes a person identifier string as an argument and returns True if the identified person is an descendant of self or False if this is not the case.  The answer should be True when the identified person is self. b) Add a method printAncestors() to Person that does what its name suggests.  You aren't likely to manage to make this look as good as the output of printDescendants, but each line should include some indication how many generations up the tree the ancestor is.  Just starting the line with a number and appropriate indentation is sufficient. from collections import namedtuple class Person():    # Stores info about a single person    # Created when an Individual (INDI) GEDCOM record is processed.    #-------------------------------------------------------------------     def __init__(self,ref):        # Initializes a new Person object, storing the string…