Completing Part 3 makes it highly probable your name and school will be posted in Part 3 Wall of Fame. This is a distinguished and relatively short list. You will be in this list at least as an Honorable Mention and possibly as a top place winner.
How can I know if I have everything 100% accurate?
Bottom line: You cannot. No routine is provided to score the answers you submitted. Additionally, the last challenge is very open ended for the purpose of distinguishing yourself from other contestants by doing something innovative with the data to produce business insight reports that may influence business decisions.
The last challenge is scored by a judge panel. The judges independently score each of the contestants suggested business insights from the data. The judge scores are averaged to select the winners.