In java Define and create an array (called emps) of object references for objects of class Employee of length 100.  (b) Create three objects for classes SalariedEmp, WeeklyEmp, and HourlyEmp (where these 3 classes are subclasses of class  Employee); and with references e1, e2, e3 for the 3 objects: (c) Assign e1,e2, e3 to the first three elements of array emps: (d) Print the earnings of the 100 employee in the array emps in one loop (with polymorphism) where earnings are calculated  with method earnings():

WRITE IN C++ A Date class is described by month(m), day(d), year(y). An Employee is described by a unique data structure having a name (e.g. “George”), salary(75000.25) and date_of_birth (06, 10, 1998). Calculate the number of days between his day of birth and (09, 20, 2023). Assume that the Employee object contains a Date sub-object)

Write a C#program that uses a class called ClassRegistration as outlined below: The ClassRegistration class is responsible for keeping track of the student id numbers for students that register for a particular class. Each class has a maximum number of students that it can accommodate.   Responsibilities of the ClassRegistration class: It is responsible for storing the student id numbers for a particular class (in an array of integers) It is responsible for adding new student id numbers to this list (returns boolean) It is responsible for checking if a student id is in the list (returns a boolean) It is responsible for getting a list of all students in the class (returns a string). It is responsible for returning the number of students registered for the class (returns an integer) It is responsible for returning the maximum number of students the class is allowed (returns an integer) It is responsible for returning the name of the class. (returns a string)   ClassRegistration -…

Lab 10 Using an interface to share methods It is often the case that two or more classes share a common set of methods. For programming purposes we might wish to treat the objects of those classes in a similar way by invoking some of their common routines.For example, the Dog and Cat classes listed below agree on the void method speak. Because Dog and Cat objects have the ability to “speak,” it is natural to think of putting both types of objects in an ArrayList and invoking speak on every object in the list. Is this possible? Certainly we could create an ArrayList of Dog that would hold all the Dog objects, but can we then add a Cat object to an ArrayList of Dog?Try running the main program below as it is written. Run it a second time after uncommenting the line that instantiates a Cat object and tries to add it to the ArrayList. import java.util.*;public class AnimalRunner{   public static void main(String[] args)   {      ArrayList<Dog> dogcatList = new ArrayList<Dog>();…