Appointment and Qualification of Trustee as Fiduciary Interaction 1

Katarina’s will leaves certain land in trust for her daughter, Anatasia. She named her sister, Muriel, and brother, Sebastian, as the trustees. She named Bank of America’s trust department as the successor trustee. Katarina died unexpectedly six months ago, thereby activating the trust. At the time of Katarina’s death Muriel, was a 30-year-old photographer living in Milan, Italy and Sebastian was a 16-year-old high school student in Miami, FL. Who is the proper trustee(s)?