Mathematics · Reasoning and Seating Arrangement

Seven persons X, Y, Z, P, Q, R, and S are sitting around a circular table facing the centre, but not necessarily in the same order. Q is fourth to the left of Y. P is third to the right of X. Y is to the immediate right of X. Z is fourth to the right of R. R is not an immediate neighbour of P. Who i s sitting second to the left of S?