you are to use Java GUI widget toolkit to develop a GUI interface for a simple calculator. For now, your code will just produce and display the GUI elements, but will not respond to any events. The GUI should look closely like the following. Some programming hints:

1. Use one of the examples in the instructors power point notes as the base of your program.

2. Obviously, you need a top-level container, JFrame.

3. To help you organize the GUI, you need several secondary containers, JPanel, to group GUI elements together.

4. You need a JTextField and lots of JButtons.