Comprehension Passage
Direction: Read the following information carefully and answer the given questions.
Nine persons live in three-floored buildings marked 1 to 3 from bottom to top respectively. There are three flats on each floor Flat 1, Flat 2, and Flat 3 from west to east respectively. Only one person lives in each flat. U lives in Flat 2. X lives west of R. Q and X live in the same numbered flat. W lives in the northeast direction of X. Y lives above Z but not in the same flat number. Y does not live in the eastmost flat. W lives just below Y and just above V; they all live in different flat numbers. S and W do not live in the same flat number.
If Q is related to Y, and R is related to W. In this same way, who is related to Z?
1
V
2
U
3
Either V or S
4
X
5
S