Situation: I am sitting on a chair facing the table I am at while there is only one chair on the same side of the same table with me on my left and the middle chair under the window is behind me.
Alternative situations: I sat at the table for the meeting and there was another table in front of me. I sat down at the table and there was another table to my right.
Question: How many backpacks are on a chair in front of me?