Power of Attorney

What happens if I relinquish my Power of Attorney for my mother?
I have a Durable Power of Attorney for my mother. She has been declared incompetent since granting me power of attorney. She did not name a successor. What would happen if I reliquished my Power of Attorney at this point?
Can another child take over power of attorney or executor duties?
My mother-in-law in PA is 85 and had her oldest son set up as power of attorney and executor. Both are having health problems now. Is there any legal way to have another son/daughter take over as power of attorney or executor? The mother's lawyer has said that there isn't. The eldest son has just started dialysis and also has vision problems.
Can the agent change or contest my power of attorney?
can my original power of attorney be changed or contested by the person i originally gave power of attorney to
Is a power of attorney from Illinois valid in Washington?
My mother made a power of attorney in IL, with my brother being the agent living in KS. Is that still valid in WA?
Do my parents need separate powers of attorney for Florida and Connecticut?
I am trying to support my parents and their needs for the correct legal documents. They are legally Florida residents but essentially live in Connecticut half the year. Two questions: 1.) Would durable power of attorney in Florida require me (live in CT) to be present to make any decisions on my parents behalf? 2.) Living in two locations, would it require separate POA's for both states, if they were to become ill when in CT?