A, B, C, D, E and F live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it is numbered 2 and so on till the topmost floor is numbered 6. D lives on an even numbered floor but not 6. The sum of floors on which F and D live is 7. E lives immediately above B. The sum of floors on which D and C live is 3. How many people live below D?

P, Q, R, S, T and U live on six different floors of the same building. The bottommost floor of the building is numbered 1, the floor above it is numbered 2 and so on, the topmost floor is numbered 6. T lives on an odd-numbered floor but not on the bottommost floor. S lives on the topmost floor. Only two people live between T and R. Only R lives between Q and U. U does not live on the bottommost floor. On which floor does P live?

X, Y, Z, S, T, and U live on six different floors of the same building numbered 1 to 6 from bottom to top. Only two people live between T and Y. Only S lives above U. Z lives on an even-numbered floor. T lives on the lowermost floor. How many people live between X and T?