The application for tracking the geolocation of minibuses

The application must be designed in a language Basics4Android (B4A) There are 10 minibus routes, in each approximately 20 minibuses Administrator, has the right 1. Add new routes, disable or delete existing routes. 2. Add new users (name + phone), deactivate and delete. Users: 1. minibuses should see each other on the map and the distance between them. 2. Geolocation must be carried out along the route line (if this is difficult, then it is not necessary) FireBase- The application needs to be integrated with FireBase