Develop an expense tracker application$/$web$-$app that serves as a comprehensive expense management solution, using Flutter $/$ Dart code. Provide screenshots for the codes and architecture diagram.The expense tracker project has two users, the admin and accountant and everyone has an authorized level.the accountant can access to the expenses and categories them. The admin can access and view the daily, weekly and monthly expenses reports. The project shall be integrated with the database $($firebase$).$ Users can log in or register to create an account and access the website or the app and view and manage his expenses.