Hello there ; I have two questions 1) If the curtain that is flooded in the basement, as in the first two pictures, is included in the curtain group, a part of which continues above, should we define any group of curtains in the basement, that is, on the lower floor? 2) I know that in the regulation it is necessary to define a group of curtains for curtains such as t, l, c. But in a situation like the 3rd picture, should we consider it as a curtain group?