How many persons booked the ticket between U and R?

Study the following information carefully and answer the questions given below. Eight persons viz. P, Q, R, S, T, U, V and W books their train ticket in different months, February, September, November and December on two different dates 9th and 16th of the same year, but not necessarily in the same order. W books the ticket in the month having 30 days and three persons before
V. P books the ticket in the same date as V but he booked neither in February nor in December. The number of persons booked after P is the same as before S. The number of persons booked between P and V is one more than between W and R, who books after U. Q and U booked their tickets on the same date.