"For this program, you will create a very basic address book app that allows the user to manage a list of contacts. The app will allow the user to add new contact, delete a contact, or update a contact. The app automatically saves the contacts when the app quits. It also automatically loads the contacts when the app starts. On the left is the list of contacts displayed by last name and first name. Sorting the list is optional. Selecting a contact will populate the form on the right with the details. The details can be changed and saved by clicking the update button. Optionally, you can bind the model to the key events so that changes to the fields automatically update the model and update the list view. To delete a contact, simply select a contact in the list. Then click on delete. You may provide optional dialog prompting if the user really wants to delete the contact. Clicking on will create an empty contact, added to the list and display it in the form. The user then updates the empty form. The classes you will need is Contact which has all the fields shown in the form. It must be serializable as you will need to be able to save and load them."