You need to contact law enforcement (who may not actually be able to assist you) and the court system ASAP. I STRONGLY suggest that you contact an attorney to help you, as I believe that you could be in for a long and nasty struggle.
You do not have the power to do so. Only the testator can change the will. You can always decline the responsibility and the court will appoint someone else.
Once you have completed the Power of Attorney, you should give the original to whomever you named as the power of attorney (attorney-in-fact) and keep a copy for yourself.
A will can't make you a power of attorney. There is no point in making someone a power of attorney if you don't tell them about it. And a power of attorney expires on the death of the grantor.
You can find a do it yourself power of attorney handbook online or at your local bookstore.
Only the grantor can remove a power of attorney. In some cases that would be the court.
Yes
You can find a do it yourself power of attorney handbook online or at a bookstore that contains answers to commonly asked questions and also provides fill in the blank forms on CD.
You revoke the POA in writing and deliver a copy to the daughter. YOu should send a copy to any entity where it had been used. Once you revoke it you can execute a new one naming a new attorney-in-fact.
If it is in "THERE" name, No. If it is in "THEIR" name, maybe.
No, a power of attorney cannot delegate their authority to another power of attorney.
To remove a power of attorney, you must create a formal document called a revocation of power of attorney. This document should clearly state that you are revoking the previous power of attorney and include details such as the date and the names of both the principal and the agent. Once drafted, sign the revocation and distribute copies to the agent, any relevant financial institutions, and other parties who were aware of the original power of attorney. It's also advisable to notify the agent directly to ensure they understand their authority has been revoked.
Either the maker can revoke it or the attorney-in-fact can resign. Both must be done in writing with notice to the other parties involved.