Unable to answer "What’s the surface here?" – Foot Path – way/749829170 via StreetComplete 58.1:

This section is no path. The building is connected to the road on the other side

There is a fire hydrant without a sign

via StreetComplete 61.1

Attached photo(s):
https://streetcomplete.app/p/286903.jpg

Unable to answer "What kind of building entrance is this?" – node/11528385726 via StreetComplete 57.4:

Es handelt sich um kein einzelnes Gebäude, es gehört zum Haus Nummer 5

Unable to answer "What diameter is specified on the sign for this fire hydrant?" – Fire Hydrant – node/3601359441 via StreetComplete 57.1:

At the marked location there is the hydrant itself, not a sign where I can note the diameter from

Attached photo(s):
https://westnordost.de/p/204610.jpg