How many persons are not facing south?

Study the following information carefully and answer the questions given below. Eight persons P, Q, R, S, T, U, V and W are sitting in straight line. Some of them are facing north while some of the facing south but not necessarily in the same order. V sits at one of the extreme ends of the line. Only three persons sit between U and
V. P sits second to the right of U. Both R and Q are facing the same direction. S faces north. T sits to the immediate right of
V. R sits third to the right of Q. Both U and T face the same direction as P. Only three persons sit between S and W. U sits to the immediate left of S. W is not facing the same direction as
V. Both the immediate neighbors of S face opposite directions.