Which of the following acts of using the works of others is most likely to be considered copyright infringement? (1)Quoting a paragraph from a book where the original author has been deceased for 50 years and the source is indicated. (2)Quoting two propaganda posters of the Ministry of Education found on the Internet, with the sources indicated. (3)Broadcasting a live and pay-to-view concert in the personal real-time post that will disappear after 24 hours. (4)Any of the above may constitute copyright infringement