Question

I am a private tutor. A student scheduled a lesson with me in computer science. The trouble is that it became clear to me that the “lesson” is actually guidance in solving a final assignment that replaces an exam. 
A. The assignment is an exam in terms of its structure and style of questions. 
B. The word “exam” does not appear on the assignment, nor are there instructions forbidding the use of outside materials.
C. There is a very strong presumption that it is obvious to the academic institution that the students will use Google and help one another on the assignment—they do not require setting up a camera, and they send the assignment by email for submission within six hours.
Is it permitted to give a lesson in such a situation? How much is this a gray area, or to what extent can I keep my head down and stick to formalism, given that there are no explicit exam instructions on the assignment? [I am asking more from a halakhic-legal perspective than a moral one, though of course I would be glad to hear an opinion on both aspects.]
D. The student claims that he knows the material and will only need me for verification and perhaps filling in gaps on a specific type of question. That seemingly makes things easier (how is this different from a teaching assistant helping him understand the wording or giving him half a nod when he is heading in the right direction), except that of course in real time he may have difficulty with everything, and if I am taking money I will not be able to start hairsplitting with him on moral grounds.