Situation: I am standing between a table and a whiteboard, while there is a backpack in my one o'clock direction.
Alternative situations: I am writing things on the whiteboard, but I need something from my backpack on the table. I am standing in between the whiteboard to my left and the table to my right talking to the audience on my right side on the sitting on the rows of chairs.
Question: Can I be able to stretch my hand and pick my backpack placed on top of the table?