Hello there ,new player here and i would like to ask some questions if anyone know and can answer

my questions are
1) everyone say that arrows drain stamina : how much stamina average ? 5 % ? (does that apply to training too or only official matches - friendly )
2) they say pressing all field drain stamina too : how much again ?
3) man to man also ?

that mean if lets say all drain 5% each in 1 match i drain 15 % more ?

4) does friendly cost as much stamina as a cardio and practice match ?

to my so far experience friendly give approximately same amount of skill points as cardio + practice match but 15 % to 20 %
more chances for injury (am i right or my maths suck? )