I am not able to solve this Javafx Code, can somebody kindly look into it?

Question 3 Multi-Scene JavaFX Application with Objects A sample program Q3Skeleton.java to keep track of 3 best friends as strings has been posted in an announcement. Its home screen shows the friends' names. Its edit screen allows you to change your best friends. Its play screen gives randomly generated suggestion of one friend to play with. You will enhance the skeleton with 3 new features. Feature A below entails the most work. It carries the same weight as features B and C combined. A. Change strings for a friend name in the sample to an object with 2 data attributes. If you choose to build a contact list as shown, the two attributes will be name and phone number. See Figures 1 and 2 . B. Read initial data from a file when starting the application and save updated data to the same file when closing the application. I - For your own testing, you want to make some changes to the data. Close the application. Opening the app again should show you the changed data saved. C. Add a Refresh button on play screen. Pressing the refresh button will regenrate another friend name. The screen should look like Figure 3. Figure 1. The grid pane of Home Screen has 3 columns now. Figure 1. The grid pane of Home Screen has 3 columns now. My Best Friends Edit Screen 1 2 3 Figure 2. The grid pane of Edit Screen also has 3 columns. Suggestion: Play with Peter. Figure 3. Play screen has a new refresh button to regenrate friend's name. Tips 1. Testing is important and tricky. In an early version, I had a bug of not saving the edited names in the file if I did not leave the Edit Screen before closing the application. 2. Deciding on the right order to implement the three required is important. 3. For time management, if after spending 30 minutes on this question and you made no progress, you should consider switching to Question 1 or 2