I need help please!!

Cody is working as an undercover drug agent. He enrolls in classes at State University where he meets several students in business administration and invites them to come to his house for a party. No mention is made of any drugs, but he does say he will have a keg of beer. Shortly after his guests arrive, he gets out some marijuana and encourages the group to have some. All of them refuse, except Sam, who has never tried it before. When Sam lights up, Cody arrests him for possession of a controlled substance. Sam: is clearly guilty as charged. O has a valid defense of duress. can raise the Fourth Amendment to exclude the marijuana as evidence that has been illegally seized. can raise the defense of entrapment, claiming Cody has enticed him to commit a crime that he would not have committed otherwise