Which member of the faculty are teaching the most courses and what is his/her general course level?
member of the faculty refers to hasPosition <> 0, most courses refers to max(count(course.course_id))
SELECT T1.p_id, T3.courseLevel FROM person AS T1 INNER JOIN taughtBy AS T2 ON T1.p_id = T2.p_id INNER JOIN course AS T3 ON T3.course_id = T2.course_id GROUP BY T1.p_id ORDER BY COUNT(T2.course_id) DESC LIMIT 1