1. Use Notepad to create new text file named "EX02_1.java". Enter the following two lines (be sure to replace YourFullName with your full name): // Filename: EX02_1.java // Programmer: YourFuliname 2. Create a program that declares a constant named "PI" of an appropriate data type, and then assigns 3.14159 as its value. Use an input dialog box to display a message "Enter the radius". Store the user input in a variable named "r"". Perform a calculation based on the following equation, and then display the output in another dialog box. Let the output message be "The area is a." (where a is the result of calculation). area=r2 3. Make sure the output looks similar to the following. [Note: Be sure to use input an output dialog boxes; othenvise, you might receive zero.] and 4. Download the provided template file and rename it to "EX02.doc" (or docx or .pdf). Capture screen shot(s) similar to the above figure(s) and paste it to the Word document