Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to root the kindle fire hd [title] Verify that you have access to either a windows 7 or windows 8 computer. [step] The programs you'll need to access are only compatible with these operating systems. [title] Back up all personal data to amazon's servers.

Ending1: [step] If any of your browsing history is able to be stored on your computer, amazon will let you know. [substeps] If you don't get free access to your account, amazon will tell you that any personal data on the amazon server can be backed up, and amazon will allow you to view your mail later on. Ending2: [step] This includes your credit card or debit card number, your phone number, or any other personal data that is associated with your kindle device. [substeps] Sometimes it's easy to cancel a connection without using your amazon account and sending in a bill or business card over the wire. Ending3: [step] If you use an existing data storage system, such as an older version of amazon, the data you are restoring will be shared between machines. [substeps] You'll also need a separate usb storage device with the same name. Ending4: [step] Rooting your kindle fire could potentially result in personal data loss. [title] Verify that the battery level on your kindle fire hd is at least 70 percent charged.

Answer format: ending1/ending2/ending3/ending4