What are the names of all instructors who advise students in the math depart sorted by total credits of the student.
return students ;return #1 in the  math depart ;return total credits of  #2 ;return instructors who  advise #2 ;return names of  #4 ;return #5 sorted by #3
['select', 'filter', 'project', 'project', 'project', 'sort']