Final answer:
To place the six channels in order, compare the birth dates and be aware of potential problems.
Step-by-step explanation:
To place the six channels in order from the most recent to the oldest, you can compare the birth dates of the three paths from Part 1 and the three paths from this part. For example, comparing birth dates, you could place Parent1 with the most recent birth date first, followed by Parent2, John, and then the other two birth dates.
Some problems you might encounter when placing the channels in order could include missing or incomplete birth date information, uncertainty about the exact birth dates, or overlapping birth dates where it's unclear which one is more recent or older.