Is assaulting Bunkers too hard ?

[Stejones82]

Not owning the game, here are a few questions regarding scale:

What is represented by a bunker hex in PzB Normandy? 1 bunker, 2 bunkers, indeterminate abstract representation of bunkers, or perhaps, bunker-esque terrain?

How much time is represented by a turn? (I know, this I could look up.)

Is there a "surrender" feature? I.e., a representation that the defenders simply throw up their hands and appeal to the mercy of "Lt Speirs." [personal opinion - - - this always seems to be a weakness of JTS combat results system].