DRAG DROP
You administer three Microsoft SQL Server 2012 servers named ServerA, ServerB, and ServerC.
ServerA is the acting principal and ServerB is the mirror. You need to add ServerC as a witness to the
existing mirroring session between ServerA and ServerB. You need to achieve this goal without
delaying synchronization. Which three actions should you perform in sequence? (To answer, move
the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)
Answer: 
Explanation:
http://msdn.microsoft.com/en-us/library/ms190430.aspx