Photoshop :: Drawing Of Room

I am doing a Marketing Course at Uni and part of my assignment is to design a shop how we would like it set up. I have drawn 2 pictures (with Pencil and Paper!) looking down on the shop from a slight angle.

Since doing this, our lecturer has told us that if we wish, we can use some software to also draw them, as long as we also hand in the hand drawn pics. As most of us don't know how to use Photoshop, we've been told that we can get someone to do it for us and we just have to make a note on our assignment of who drew them and what software was used.