Write SQL query to solve given problem: Is the donor who donated to school "d4af834b1d3fc8061e1ee1b3f1a77b85" a teacher?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.is_teacher_acct FROM projects AS T1 INNER JOIN donations AS T2 ON T1.projectid = T2.projectid WHERE T1.schoolid = 'd4af834b1d3fc8061e1ee1b3f1a77b85'