Direction: Study the following information carefully to answer the given questions.
A family of eight people – P, Q, R, S, T, W, X, and Z, from three generations live in a house. S, the daughter of Q, is married to the son of T. R is the son of X, who is married to T. Z has two daughters. Q is the grandfather of P. T is the mother of two sons. R is not married to S.