to act as executor or trustee under the last will and testament, or as administrator, with or without the will annexed, of the estate of any deceased person.
as executor of or trustee under any last will and testament, whenever the corporate fiduciary is the successor to any corporation appointed in the last will and testament, whether such succession is the result of merger, consolidation, or otherwise.
as the natural person and the corporate fiduciary may agree to and the court making the appointment shall approve.
IC 28-14-3-13