Question 455332
There are 8 vertices- 4 are part of the rectangle that is at height 0 like the origin. This is the bottom face of the rectangular solid. The other 4 are part of the rectangle that is at height 2 like the given point R. This is the top face of the rectangular solid.

The bottom rectangle has vertices (0, 0, 0), (0, 3, 0), (-1, 3, 0), and (-1, 0, 0). The top rectangle has vertices (-1, 3, 2), (-1, 0, 2), (0, 0, 2), and (0, 3, 2).