Importing and AI files and breaking pencil line apart

Hi I have two questions one regarding importing AI (Illustrator) files and the editing pencil lines

The first question is: can a sequence of numbered AI files be imported as frames automatically?

and the second questions is: How do I split a pencil line at a single point on the line. For example say I have three lines that converge at a single point forming a Y how would I split the it into 3 separate lines

If it helps what I’m referring to in the second question is called “cut path at selected anchor point” in Illustrator
and is demonstrated about 30 seconds into this video