Find the name and position of the head of the department with the least employees.
return departments ;return employees of #1 ;return number of  #2 for each #1 ;return #1 where #3 is lowest ;return head of #4 ;return name of #5 ;return position of #5 ;return #6 ,  #7
['select', 'project', 'group', 'superlative', 'project', 'project', 'project', 'union']