Ответьте на вопросы к тексту

1. What building materials were used in the superstructure?

2. What elements of the building was each of them used for?

3. What kinds of foundation does the superstructure bear on?

4. What soil is there underneath the structure?

5. How is the stability of the middle unit assured?

6. Why does the front unit have a concrete raft foundation stiffened by concrete basement walls?