The top and side views imply to me that it isn't possible to know for sure. Am I wrong?
Discussion
This. The middle row height is unknowable for the 2 height and most of the 3 height section.
It could be a single layer with C shaped taller sections for example.
Yeah there are many issues with this. This is exactly how the smartest kid in a class gets an A and the 2nd smartest kid gets an A+