Five friends – P, Q, R, S, and T – live on separate floors of a 5-floor building, not necessarily in the same order. The ground floor is numbered 1, the first floor 2, and so on up to the topmost floor numbered 5. • S lives immediately above P. • Only two friends live between S and T. • P lives on the lowermost floor. • Q does not live on an odd-numbered floor. Which floor does R live on?