How is R related to V?

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Question

Answer the following questions based on the information given below. There are eight members, R, S, T, U, V, W, Y, and Z in a family which consists of three generations. No single person in the family is a parent. S is the paternal grandfather of V. V is the only brother of W. W is married. U is married to Y. Y is mother-in-law of R. Z is daughter of T. Z has a niece.