Answer 1

1) Obtaining a college level degree in Piano is the most important way in becoming an accomplished pianist.

2) Being an accomplished pianist doesn't necessarily mean being a worldwide renowned super star.  An accomplished pianist is someone who can make a living off playing/teaching a piano at a high standard.  Most people who have a background with piano are able to start a music studio or even get hired as a private teacher.

3) I had 2 sources of evidence for this answer.  The first one was my second interview Ms.  Aurora my service learning provider who majored in Piano.  The second one was my first interview Ms.  Sally my piano tutor who also majored in Piano.