What is the ruling on money earned from a company that solves students' assignments for a specific university, with the university's permission and without compelling the students?

School assignments and projects are intended to train students and test their abilities. Therefore, students must do them themselves. It is impermissible to prepare them for them, whether for a fee or without, as this constitutes deception and corrupts the youth. The university might intend, through these assignments, to gather correct scientific material for the student to review or memorize, in which case there is no objection to preparing them, and the earnings would be lawful.