Find the name and position of the head of the department with the least employees.
SELECT T2.name ,  T2.position FROM department AS T1 JOIN physician AS T2 ON T1.head  =  T2.EmployeeID GROUP BY departmentID ORDER BY count(departmentID) LIMIT 1;
head of the department refers to T1.head = T2.EmployeeID; least employees refers to MIN(count(departmentID)); name and position of the head refers to T2.name, T2.position;