For s,tāN, consider the set M\equal{}\{ (x,y) \in \mathbb{N} ^2 | 1 \le x \le s, 1 \le y \le t \}. Find the number of rhombi with the vertices in M and the diagonals parallel to the coordinate axes. analytic geometrygeometryrectanglefloor functionceiling functiongeometry unsolved