Open the project named ch07_ex3_AreaAndPerimeter that’s stored in the ex_starts folder. Then, review the code for the AreaAndPerimeterApp class. 2. Create a class named Rectangle and store it in the same package as the AreaAndPerimeterApp class. 3. In the Rectangle class, add instance variables for length and width. Then, code the get and set methods for these instance variables. If possible, use your IDE to generate the get and set methods. With NetBeans, you can get started by selecting the RefactorEncapsulate Fields command. 4. Add a constructor with no parameters that initializes the length and width to 0. 5. Add a get method that calculates the area of the rectangle and returns a double value for the result. If you want, you can copy the code that performs this calculation from the AreaAndPerimeterApp class. 6. Add a get method that returns the area as a String object with standard numeric formatting and a minimum of three decimal places. To make it easy to refer to the NumberFormat class, you should add an import statement for it. 7. Repeat the previous two steps for the perimeter. 8. Display the AreaAndPerimeterApp class. Then, add code that creates a Rectangle object and sets its length and width. 9. Modify the code that displays the calculations so it uses the met

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