Seven boxes, P, Q, R, S, T, U, and V, are kept one above the other, however not in this particular order. The box, which is at the bottom, is numbered as 1, the box above it as 2 and so on. T is three boxes above P such that both are prime numbered boxes. There is one box between T and U. R is two boxes above Q. Q is an odd numbered box. V is above S. Which box is three boxes above R?