Question 5 (3.03 points) Brian, who is sixteen years old, signs a contract to buy a new stereo system and speakers from Radio Mart for the car his parents just gave him as a birthday gift. Later, after having the system installed in his car, Brian disaffirms the deal. He 1) can keep the stereo and speakers, since it already has been installed. 2) can keep the stereo, but not the speakers, since they are easier to remove. 3) can keep the speakers, but not the stereo, because the stereo can be resold. 4) must return both the stereo and the speakers