Wa aleikum as-salam wa rahmatullah wa barakatuhu. Mina is the place where you collect the pebbles to throw at the shaitans. It's a few miles from Mecca and it's not a seaport, although you might call it a port of sorts because of the thousands of busses there during Hajj. Mina girls name means in Arabic: Sea port, a place near Makkah. Check this site: http://www.babynology.com/meaning-mina-f...
Hamlet the play has occasionally been referred to as the Shakesperean tragedy that is closest in spirit and texture to Greek tragedy.
The question for you is not so much, how can you tell that Hamlet is morally ambiguous, but why does Shakespeare make him morally ambiguous. In some ways Hamlet is the first modern tragic hero. He doesn't just go and do what he's taught is right, he has to work it out for himself.