Who among the following lives on the topmost floor?

Study the following information carefully and answer the question given below: There are Eleven people P, Q, R, S, W, X, Y, Z, A, B and C are living in a 11 floor building on different floors from top to bottom (such as ground floor is numbered as 1 and top floor is numbered as 11) but not necessarily in the same order. P live above
X. A live above W but not immediately. W does not live immediately above or immediately below R.Y lives on 7th floor. Two person live between Y and Z. S live immediately above Z. There is as many person living above S as below Q. Five persons live between X and C, who lives below Y. Only one person live between Y and R.B lives below R