Do I would like a supporting wall?

I'm new to structure and I'm taking a highschool class proper now. We have now an project to design an inexpensive home from begin to end. my solely query is that if I would like a wall to help my second flooring, as a result of at present my first flooring is a superb room sort room, with the rooms and primary tub on the second. the ground plan is hooked up, the highest sketch is the underside flooring