Can someone help me with this lab exercises:

Lab 4 - Relationships among classes: Inheritance 4.2. Exercise 1 4.0. Lab Goals Consider the two following classes (Meancomputation and - Use inheritance to create hierarchies of related classes StandardDeviationCalculation). The main usage of MeanComputation class is to compute the mean (average) of values received in an array as parameter of the - Declare and usc of protccted methods constructor. Similarly, the main usage of StandardDeviationCalculation class - Override superclass method is to calculate the standard deviation S, for values received in an array as parameter of - Use super keyword to call one of the superclass's methods or constructors the constructor, where s=n(xx)2 4.1. Recall public class MeanComputation \{ private double[] numbers; - Inheritance (is-a relationship): a class (subclass) that is created using the keyword extends based on another existing class (superclass); inherits all members except private members. If we have a class called MidtermExam that inherits another class called Exam, we say that the class MidtermExam has a relationship is-a with Exam: public class MidtermExam extends Exam \{ 3 - protected method: to make a method accessible by members of subclasses and not by other classes in different packages, we declare the method as protected in superelass: protected int getorder() \{ 3 - Override a method: if a class needs to specialize a method of its superclass, we rewrite only the signature of the method in the subclass with different body. - super keyword: when a constructor (or a method) necds to call a constructor public Meancomputation(double[] numbers) \{ this.numbers = new double[numbers.length]; for(int i=;i