Im gonna be mascot??? HELPP!!!!!?

Ok so i am gonna try out for mascot. There was a meeting and i was the only one there for mascot so im a shoe in. But she said i still have to make a skit that is 3 minutes long. What is a skit??? She said i could have music. What would be a good song or mixtape? How do i make a mixtape on the computer? Maybe iTunes?? HElPPPP!