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Design an Essay class that is derived from the GradedActivity class presented in this
chapter. The Essay class should determine the grade a student receives on an essay.
The student’s essay score can be up to 100, and is determined in the following manner:
• Grammar: 30 points
• Spelling: 20 points
• Correct length: 20 points
• Content: 30 points
Demonstrate the class in a simple
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- Exercises: PolymorphismProblem 1. VehiclesWrite a program that models 2 vehicles (Car and Truck) and will be able to simulate driving and refueling them inthe summer. Car and truck both have fuel quantity, fuel consumption in liters per km and can be driven givendistance and refueled with given liters. But in the summer both vehicles use air conditioner and their fuelconsumption per km is increased by 0.9 liters for the car and with 1.6 liters for the truck. Also the truck has a tinyhole in his tank and when it gets refueled it gets only 95% of given fuel. The car has no problems when refueling andadds all given fuel to its tank. If vehicle cannot travel given distance its fuel does not change.Input On the first line - information about the car in format {Car {fuel quantity} {liters per km}} On the second line – info about the truck in format {Truck {fuel quantity} {liters per km}} On third line - number of commands N that will be given on the next N lines On the next N lines –…Exercise 6 - Loaded Coin Simulation Make a new class in the Lab2 project called LoadedCoinSim that simulates the toss of a loaded coin. A coin is loaded when it is constructed such that it is more likely to land on one value than another. Assume the probability the coin will land head is HEAD_PROB, and declare that as a constant in your program. Initially, use a value of 0.75, which means 75% chance the coin will show heads. Given this probability, simulate ten coin tosses and displaying the result. At the end, display the number of times the coin showed heads. The output should appear like this: Toss 1: HEADS Toss 2: HEADS Toss 3: HEADS Toss 4: TAILS Toss 5: HEADS Toss 6: HEADS Toss 7: HEADS Toss 8: HEADS Toss 9: TAILS Toss 10: HEADS Number of heads = 8public class StairViewer public static void main(String(] args) // Step 2: Create a rectangle and draw it as the // top step of the stair // location: (20, 10) // size: (20, 20) 18 // Step 3: Create a rectangle and draw it as the 19 // middle step of the stair 20 // location: below the top step, aligned on left // size: (40, 20) 21 22 23 24 // Step 4: Create a rectangle and draw it as the 25 // bottom step of the stair 26 // location: below the middle step, aligned on left // size: (60, 20) 27 28 29 30 } 31 32
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- 9 public class PictureViewer 10{ public static void main(String[] args) 11 12 // Step 2: Fix the syntax errors and submit it to Codecheck to pass the test. // Note: Do not add or remove any statements 13 // 14 15 // Do not change the semantics of each statement Do not add or remove any variables Do not add or remove any objects Magic numbers are allowed 16 17 18 // 19 // 20 // Create an object of Picture by loading an image Picture pic = Picture("starry_night.png"); 21 22 23 // Display the width and height System.out.println("Width : " + pic.getWidth()); System.out.println("Height: 24 25 + pic.getHeight()); %3D 26 27 // Increase the width by 50 on both sides and // increase the height by 40 on both sides. // Must use dw and dh when calling method grow(). int dw, dh = 40; pic.grow(dw, dh); 28 29 30 31 32 33 // Display the width and height System.out.println("Width : System.out.println("Height: 34 + pic.getWidth()); + pic.getHeight()); 35 36 37 // Draw the picture draw(); 38 39 40 //…Object Oriented Programming in JAVA You are part of a team writing classes for the different game objects in a video game. You need to write classes for the two human objects warrior and politician. A warrior has the attributes name (of type String) and speed (of type int). Speed is a measure of how fast the warrior can run and fight. A politician has the attributes name (of type String) and diplomacy (of type int). Diplomacy is the ability to outwit an adversary without using force. From this description identify a superclass as well as two subclasses. Each of these three classes need to have a default constructor, a constructor with parameters for all the instance variables in that class (as well as any instance variables inherited from a superclass) accessor (get) and mutator (set) methods for all instance variables and a toString method. The toString method needs to return a string representation of the object. Also write a main method for each class in which that class is…Problem: Bugs are simple creatures that only know how to walk towards other bugs. Bugs maintain information about their (x, y) position; by which it can tell if they are standing next to other bugs. Watch the following video: bug movement. Create a java project that simulate bugs movement. You need to write a class “Bug" that models a bug moving along a straight line and it can turn to change its direction counterclockwise (i.e. 90 degree to the left; north → west → south → east → north). In each move, its position changes by one unit in the current direction. Details of the "Bug" class is described below. Your simulator should read information of an unknown number of “Bug" objects from an input file called “Bugs.txt". Each line represents a bug and the initial position and facing direction of this particular bug. Keeping the first bug position as a reference the simulator should move the second bug next to the first bug forming a cluster and its final position and direction should be…