Use the following partial class definitions to answer the question:       public class A1       {            public int x;            private int y;            protected int z;       }       public class A2 extends A1       {            protected int a;            private int b;       }       public class A3 extends A2       {            private int q;       } Which of the following lists of instance data are accessible in A3? Group o

Problem 4) Suppose the following Course class is given: public class Course { private String name;//such as CS, MATH, etc private int grades[];//list of the grades //default and initial valued constructor //all other methods public double average() { double sum=0; for(int i=0;i=90) System.out.printf("me is a student with A letter-grade\n");

Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works.  Next add the following public methods to the Address class and test them from main as you go: Write getters and…

Fix this code for any errors

Design a class named LinearEquation for a 2 × 2 system of linear equations: The class contains: ax + by = e cx + dy = f ■ Xx= ed - bf ad - bc y = af - ec ad – bc Private data fields a, b, c, d, e, and £. ▪ A constructor with the arguments for a, b, c, d, e, and f. ▪ Six getter methods for a, b, c, d, e, and f. ▪ A method named isSolvable () that returns true if ad – be is not 0. ▪ Methods getX() and getY() that return the solution for the equation. Draw the UML diagram for the class then implement the class. Write a test program that prompts the user to enter a, b, c, d, e, and f and displays the result. If ad - bc is 0, report that "The equation has no solution."

Provide the missing code segment in the portion with the TO DO remark in the following sample code. The Book class involved in the code is provided below:    public class Book implements Comparable<Book> {    protected int pages;      public Book(){        pages = 1500;    }      public Book(int pages){        this.pages = pages;    }      public void setPages(int pages) {        this.pages = pages;    }      public int getPages() {        return pages;    }      public int compareTo(Book another) {        // if same then return 0        if(this.pages == another.pages)            return 0;        //if current has more than return 1 else return -1        else if (this.pages > another.pages)            return 1;        else            return -1;    } }

B2

TressetteYou are given the types: type colore = Spade | Coppa | Bastoni | Denari ;; type valore = Ace | Two | Three | Four | Five | Six |Seven | Jack | Knight | King ;; type mazzo = Null | Carta of carta and carta ={ c : colore ; v: valore ; mutable tl : mazzo };;  (see the picture with cards) a. Write a function points : mazzo -> int = that given a deck of cards calculates its point score. The scoring is as follows: Ace is worth 1 point; Two, Three, King, Knight, Jack are each worth 1 3 ; and the rest do not contribute the the point total. The total point score is equal to the sum of the individual points, rounded down at the end. b. Write a function max_cards : mazzo -> mazzo = that takes a deck of cards and filters out everything except the greatest cards by value (valore) of each color. The order of cards by value is as follows: Three > Two > Ace > King > Knight > Jack > Seven > Six > Five > Four.   Due to the size of the output, lists like…

Number 24