It depends on the question with some questions on advanced aerodynamics I would say that is outside my knowledge and not really relevant to the syllabus but we can both find out for next time and I will discuss it with you.
The important thing is not to bull**** you way through it as I have see so many do. Bull**** may baffle brains but it will never replace them
By the way, and with the greatest of respect, that is such an elementary instructional question that should be dealt with on every FI course.