Situation: Sitting by a table surrounded by three chairs and facing away from some other tables in the room.
Alternative situations: I am sitting on a chair and table in top right corner of the room eating lunch, middle chair. I am having dinner with two colleagues at a round table. In front of me there are no more tables and my colleagues are seated respectively on my right and left.
Question: Are the three round tables behind me all the same or all different sizes?