A:Answer5th generation means the 5th version or release of the iPad. For specifications of the 5th generation iPad see the Apple details at this link https://support.apple.com/kb/SP751?locale=en_US
A:AnswerI don’t think you can use an Apple Pencil. I have been using a smartphone stylus with no problems. The next generation of iPad (6th gen-2018) supports the Apple Pencil.