General Intelligence · Seating Arrangement

P, Q, R, S, T, U and V sit around a circular table facing the centre not necessarily in the same order. Only four people sit between P and V when counted from the right of P. R and T are immediate neighbours of Q. Only four people sit between U and S when counted from the left of U. S is not an immediate neighbour of R or V. How many people sit between R and S when counted from the left of R?