Hello - New to the system, sorry if this is a redundant question. I'm doing Logic Pro X 101, and between Videos 2 & 3 the music arrangement changes substantially. Video 3 begins with a very different arrangement than Video 2 ended with. The track contents are quite different, and an Arrangement Track has been added which was not there in Video 2. The Arrangement Track seems to be crucial for performing the steps in Video 3, but it's never explained where that Track comes from. Are there Exercise Files for this course, so that I can start from the same starting point as Video 3? Thanks for your help.