Situation: I am sitting on a chair facing the table while there is a black chair on my right and I can see the blackboard on the opposite side of the room.
Alternative situations: I sat at the table for the lecture and looked at the blackboard in front of me. I am seated in a chair near the left corner of the table looking across the room, and there is a window to my right.
Question: Can I reach the trash can from the blackboard?