Xiao-Yu is a college freshman. A class she takes requires that she submit a film critique as a term paper. Which of her following actions constitutes copyright infringement? (1)Copying paragraphs from different reviews posted by others on IMDb and combining them into her own report. (2)Including two theatrical release posters published by a film distributor while indicating the source. (3)Quoting a paragraph from a book whose author died over fifty years ago, with proper citation. (4)Interviewing her classmates for their thoughts on the movie and quoting them in her report