Direction: Study the following information carefully to answer the given questions:

There are six persons M, N, O, P, Q and R, who have different heights and weights. O is taller than Q and R. Only R is heavier than Q. Number of persons taller than N is equal to number of persons shorter than Q. M is heavier than P and O but not than N. P is the tallest. Neither M nor N is shorter than O.