The following class represents a 3d shape using an array of 3dPoints. It is intended to be immutable. Assume the 3dPoint class is immutable. Some of these functions, by their nature, make the class mutable and should be removed completely to make it immutable. Some others might make the class mutable, but it is possible to make them safe by implementing them carefully. Others are mostly safe in an immutable class. Determine which functions should be removed, which must be carefully implemented, and which are safe. public class 3dShape { private 3dPoint points; public 3dShape(3dPoint[] points); // Sets the point array member to the given point array public void setPoints (3dPoint[] points); // Returns the point aray member public 3dPoint[] getPoints(); // turns the volume of the shape represented by the point public double getVolume(); // Stretches the shape by the percent specified in each direction public void stretch(double x, double y, double z); } The function setPoints needs to be carefully implemented to make the class immutable. The function getPoints does not need special attention to make the class immutable. The function getVolume needs to be carefully implemented to make the class immutable. The function stretch needs to be removed to make the class immutable.

Is there a different way of doing this problem?  Question: Create a class AccessPoint with the following attributes: x - a double representing the x coordinate y - a double representing the y coordinate range - an integer representing the coverage radius status - On or Off Add constructors. The default constructor should create an access point object at position (0.0, 0.0), coverage radius 0, and Off. Add accessor and mutator functions: getX, getY, getRange, getStatus, setX, setY, setRange and setStatus. Also, add a set function that sets the location coordinates and the range. Add the following member functions: move and coverageArea. Add a function overlap that checks if two access points overlap their coverage and returns true if they overlap. Add a function signalStrength that returns the wireless signal strength as a percentage. The signal strength decreases as one moves away from the access point location. Test your class by writing a main function that creates five access…

I need help in improving my code. This is an elevator simulator that uses polymorphism and object-oriented programming to simulate the movement of elevators in a building with multiple types of passengers and elevators.The system has 8 elevators, each of which can be one of 4 types of elevators, with a certainpercentage of requests for each type. Similarly, each passenger can be one of 4 types, with adifferent percentage of requests for each type. The simulation should have 4 types of Passengers: Standard: This is the most common type of passenger and has a request percentage of 70%. Standard passengers have no special requirements.  VIP: This type of passenger has a request percentage of 10%. VIP passengers are given priority and are more likely to be picked up by express elevators.  Freight: This type of passenger has a request percentage of 15%. Freight passengers have large items that need to be transported and are more likely to be picked up by freight elevators.  Glass: This type…

Complete the Course class by implementing the courseSize() method, which returns the total number of students in the course. Given classes: Class LabProgram contains the main method for testing the program. Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) Class Student represents a classroom student, which has three fields: first name, last name, and GPA. Ex. For the following students: Henry Bendel 3.6 Johnny Min 2.9 the output is: Course size: 2 public class LabProgram {    public static void main (String [] args) {       Course course = new Course();            // Example students for testing      course.addStudent(new Student("Henry", "Bendel", 3.6));         course.addStudent(new Student("Johnny", "Min", 2.9));              System.out.println("Course size: " + course.courseSize());    } }   public class Student {     private String first;  // first name    private String last;   // last name    private…