Bypass activation lock on an iPad 2

You can't "bypass" the activation lock. You will need the credentials of the Apple ID.

Or if you have proof of purchase start a support request.

How to remove Activation Lock - Apple Support

If you need help removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request.

Acitvation lock is a theft deterrent system, one of the best theft deterrent systems out there. If you're not the original owner, you cannot unlock it