Задайте к этому тексту 7 вопросов

1)what is the tollest building?
2)when it was built?
3)how match time did it take to build this building?
4)where the shops and restaurants are situated?
5)how match time it takes to travel from the ground to the 80th floor?
6)what you can see on a clear day?
7)what and why changes the color at the top of the building?