[A1] Selection Tool : (2) Lecture Hall

Now I would like to select the 

lecture hall 's chairs

The original one

First step : I'm using the "Magic Wand Tool " to select the chairs of the lecture hall.
I also have zoomed it the edge by using the "Zoom Tool" so that
it would be able and easier to select the edge properly, clearly and nicely.

Second step : I separate them by clicking the "Arranged Documents". 

Then, I use "Move Tool" to move the selection chair to the other side.

Third step : I click " Free Transform "  to resize it.

The final result

Thank you!

^_^