You are allowed to work in groups (up to 4 persons).
As proof of attending the session you will upload a copy ot the first page (your solutions), before deadline. All students attending should submit!
If you cannot attend the session, submit written solutions (a single pdf-file) no later than one week after the session. Absolute deadline to submit final versions is one week after the final exam. The next possibility will be the next time the course is given.