1] Is the terrace to be permanent or a temporary installation?
2] The brief calls for a terrace and also pavilions. Are these two separate things. Are we to propose a fixed terrace design and mobile/temporary pavilions within?
3] What sort of food will be served at this restaurant?
4] Is not there more information on 3D in Archicad?

A: the terrace is permanent,
the terrace and pavilions are separate, you can propose mobile pavilions. Pavilions will be located on the territory, that marked in yellow on the map
This restaurant have classic menu.
You can download the corrected 3D model in various formats + plan in Autocad  here