In the State of Utah, what is the punishment for perjury in a criminal case?

I've received an MIP (minor in possession) in UT. My friend was the owner of the house and got arrested that night because I was drinking in her house. My case is finished, of course I have a lot to do for my MIP (fine, cl, project reality, etc). Now, I just received a subpoena for her court case in a couple of days. The prosecutor is trying to put her in jail, because her case is now a criminal case because in her house, two minors were drinking apparently. What is the likely hood she will go to jail even though she had no idea I was drinking in her apartment? What if I said I came over to her house drunk already and she didn't give me the alcohol, will she still get jail time for that? Also, what are the penalties for perjury in a criminal case in the state of Utah? I can't find any information on this over the internet. I don't plan on lying, but I do want to know the penalties. HELP!