If there is no will then there is no executor. If there is no will then the court will appoint an Administrator for the estate and the Administrator will have the power to collect and inventory the property, pay debts and creditors, distribute the remaining estate and sell the real estate if they apply for a license from the court to do so. The law will direct who will get the remaining assets as the legal next-of-kin and how much each will get.
Generally a joint executor would have as much power as any other joint executor, meaning they had BETTER get organized and communicate about what needs to be done and who will be doing it.
A power of attorney expires on the death of the grantor. The executor needs a letter of authority.
You apply to the probate court. They have the power to appoint a new executor.
The executor does not have that power. Their job is to execute the will as written.
The executor has no power over the beneficiaries. The executor is responsible to the probate court for the administration of the estate. They must make a full accounting to the court.
You do not have the power to do so. Only the court can appoint an executor.
In most cases they would not be able to serve in that capacity. The court is not likely to appoint someone with Alzheimer's to serve as executor.
A Power of Attorney is extinguished when the principal dies. The attorney-in-fact has no power to do anything. The probate court appoints the executor or administrator for the estate.
Generally, in order to be appointed the Executor of an estate you must present the Will to the Probate Court for allowance and at the same time petition to be appointed the Executor.
The executor will have a letter of authority from the court. That should allow them to see the transactions involved.
The executor has no power as long as the individual is still living. And once the individual passes on, the power of attorney has no power.
You can be asked to serve as both, but not at the same time. And executor cannot do anything before death and a power of attorney expires on death.