Unable to answer "Which customers visit this hairdresser?" – 25 minutes (Occupational Therapist) – node/1786155199 via StreetComplete 58.2:

(Änderungs-) Schneiderei und Reinigung; Name stimmt

Attached photo(s):
https://westnordost.de/p/236760.jpg

Unable to answer "What kind of memorial is this?" – Ehemalige Straßenbahnhaltepunkt Ohlsdorf (Memorial) – node/6332870157 via StreetComplete 58.2:

Historical building (tram station house)

Unable to answer "Does this tree have needles or leaves?" – Tree – node/6404008051 via StreetComplete 58.2:

Tree has been cut down. Only the stump exists anymore.