The people who own the apartments. Individual units have individual owners, shared areas have shared ownership by whoever owns the units unless specified otherwise. Maintenance of common areas is the shared responsibility of all owners.
I don’t follow, are you suggesting it’s impossible to own a single apartment in a block? As someone who lives in an apartment I own without owning the entire building, I can tell you that’s definitely false. You don’t need a landlord to make high density housing to work.
If you’re in the US you’ll probably know them as rutabagas, it’s the standard turnip around here and a bit bigger than a white turnip. You carve them out just as you would a pumpkin, a bit more difficult but the end result is much better imo.
Scotland here, we do have a bit of an Americanised Halloween but there’s definitely elements of traditional Samhain celebrations.
Turnip lanterns > pumpkin lanterns.
A server is just some computer somewhere that other machines can connect to. You can get specialised hardware and network setups and other technical stuff, but you can also just use your personal laptop as a server by allowing people to connect to it. A server essentially boils down to someone leaving their computer on.
Wifi is just radio waves. You can think of it like people talking on a two-way radio, except instead of humans speaking it’s computers.