M, P, Q, R, S, T and W are 7 persons of three generations living in same house. There are two married couples in the house. M is the only daughter of P, who is the paternal grandfather of T.  R is the son of Q.  T is the daughter of S.  R is father of W.  T is the sister of W.  How is W related to R ?

Can't be determined

↑ or ↓ ⇒ Upward or downward arrow shown "generation gap" .

   =    ⇒ Double lines shown "relation b/w Husband & Wife"

   —   ⇒ single line shown "relation in same generation other than Husband & Wife".

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