Always check the course webpage! If something here ever contradicts the course web page assume the information here is wrong.
The tutorials (assuming you're in my group) take place in Auditorium 13 on the Wednesdays from 8:45 to 10:30.
For general questions about the organization of the course, making an appointment to discuss the assignments or ambiguities in the formulations of the Assignments you can send me an email (Please add the [2IL50] tag to your subject if you want a quick response.
For questions about the content of the assignments, whether your answer is sufficient etc. you can drop by during the open office hour on Thursday from 17:00 to 18:00 in MF 4.104b. Alternatively can drop by my office (also MF 4.104b) on other days too. If I'm not too busy I'll probably be able to answer your questions right away. If you want to make sure I have time for you, send an email first so we can make an appointment.
Generally speaking I'm in my office from roughly 10:30 to 18:30. Don't try to drop by my office at 9, I won't be there!