Well depends on what year it is but in the early ages it was for land, might need more details though
Yes. Because Cassius was the one who started the events that led onto Caesar's death and eventually on to his own death. Brutus did not like that Cassius was being un-loyal towards his own brother-in-law and therefore spoke up about it when they talked in the tent it act 4.
A) It's every man for himself around here.
HOPE I HELPED!!!!!!!!