In this exercise, you create an application that can be used to calculate the cost of installing a fence around a rectangular area. Create a Windows Forms application. Use the following names for the project and solution, respectively: Fence Project and Fence Solution. Save the application in the VB2017\Chap10 folder. 

a. Use Windows to copy the Rectangle.vb file from the VB2017\Chap10 folder to the Fence Project folder. Then, use the Project menu to add the file to the project.
b. Modify the Rectangle class to use Double (rather than Integer) variables.
c. Add a method named GetPerimeter to the Rectangle class. The method should calculate and return the perimeter of a rectangle. To calculate the perimeter, the method will need to add together the length and width measurements and then multiply the sum by 2. 

d. Create the interface shown in Figure 10-41 and then code the application. Save the solution and then start and test the application.