The purpose of the message is to tell us not to fall for lottery scams.
2.The pictures message is that the person is trying to fool you into thinking that you won a lot of money and you will pay a admin fee.Thus you should not fall for this kind of scams.
3.The intended audience is the general public.
3.The image shows a person trying to trick you into getting scamed by her lottery scam,which is trying to tell us not to get scammed easily by other people and be smart about scams like these.
4.The text shows"You Won $1 Million! Pay an admin fee to claim your prize" which tells us how they scam people and thus tells us not to get tricked by this kind of scam.