chapter-03 exercise

1. Fork the repo
2. Clone the repo to your desktop
3. Edit the code to enhance the existing app

• Add a "Party Size" TextView and EditText to the UI to allow the user to enter the number of people in the party.
• Calculate and display the amount of tip and the total owed by each person if the bill were split evenly.
• Add an EventListener so the App refreshes the calculation if the Party Size text is changed

5. Commit and Push to your repo
6. Submit a Pull request