A company has three Azure virtual networks, each containing several virtual machines. The first one contains the front-end server, the second contains the back-end server, and the third contains the database. Select all the answers so that the following holds:
- The front-end virtual network should be load balanced.
- Only the back-end virtual network should be able to access the database virtual network.
- Virtual machines in the database virtual network should scale automatically.
(Select all acceptable answers.)