Answer:
Not 100 percent sure but number 2 and 3 dont make a polygen, they only make a line. so 0.
For the fourth one i am not 100 percent sure. I think it makes unlimited polygons.
Explanation:
Again, not 100 percent sure.
The best way to find out is to draw them.
I matched the two points of 2 and 3 and they make a line they dont make a polygen as for the last one i dont think it makes any