Which two pieces of information can help you determine whether the following source is reliable?
“The Evolution of American Football” by Roger Thermill

1. The author is a big fan of American football.
2.Roger Thermill is a professor at a well-known university.
3.The author used sources written by other experts.
4.The article was published in a magazine with pictures of the sport.
5.The article was printed but can also be found online.