Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to dismount a volume [title] Click on " start " and select " control panel. [step] The control panel window will display on-screen. [title] Click on " system and security, " then on " administrative tools.

Ending1: [step] You will be brought to system and security standards page. To access this page, click on " security management, " then on " data and security. Ending2: [step] " the system and security options window will display on-screen. [substeps] If you don't see the window that you were looking for, you have not successfully located the device. Ending3: [step] A new window will display with the microsoft office application on-screen. [title] Click on " address book " located next to " directory. Ending4: [title] Click on " computer management, " then enter the administrator password. [step] Dismounting a volume can only be done by the administrator.

Answer format: ending1/ending2/ending3/ending4