42x25 rectangular roof(one side)

We need to fill this roof with 8x4 plywood pieces.
So, we need about 33 plywood pieces to fill one side roof.
How do I show a possible arrangement of pieces on half of the roof. Make a few cuts. What is the area of the scrap pieces left?

Thanks.

There seems to be no challenge to this. No limit of cuts or waste area. So any solution is ok, there is no statement that says " minimize waste, or minimize the number of cuts."

So lay out the sheets any way you want.

I would do this on graph paper.

Now if you are trying to minimize waste, or minimize the total cuts, it is entirely a different problem.