Answer: if it's stainless steel it doesn't rust. hope this helped!
In Escher's drawing, it is not clear whether the water is flowing away form the viewer or towards the viewer. In many ways, it seems to contradict the laws of physics. Moreover, the corner points of the cube above the structure are connected in such a way that it is not clear which points are the farthest and which are the closest to the viewer. In these ways, the artist plays with our perception of depth.
Yes, because you can use aspects of math to improve your artwork. For example, if you were trying to create a perfect square for a piece of artwork, it would be hard to do without math.
