A1. Darko, Andrej, and Renata live in a block. The block has four floors and a ground floor. Who lives on the fourth floor, if:

- Darko lives directly above Andrej,
- Renata does not live on the ground floor,
- Andrej has to go down two floors if he wants to visit Renata.
(A) Darko
(B) Andrej
(C) Darko and Andrej
(D) Renata
(E) nobody
A1. Renata lives in the attic, so she can live in any of the other four floors. Andrej lives 2 floors higher than Renata, so he can live on the 3rd or 4th floor. Since Darko lives above Andrej, Andrej can only live on the 3rd floor, and Darko on the 4th floor.