Examine these commands:

1. Execute "crscti stop cluster -all" as the grid user from one database server.

2. Execute "crscti stop cluster -all" as root from one database server.

3. Power off all network switches.

4. Execute "crscti stop cluster" as root from one database server.

5. Execute "crscti stop cluster" as the grid user from one database server.

6. Power off the rack using the power switches on the PDUs.

7. Execute "shutdown -h now" on all database servers.

8. Execute "shutdown -h now" on all Exadata storage servers.

Which is the correct order or the required commands to completely power off an Exadata Database Machine in an orderly fashion?