Found the leak:
I went through a process of elimination to find where the water was coming from in the refrigerator.
Ordered the part:
Searched Whirpool site to find the model number to the ice maker water line and entered that model number on AppliancePartsPros.com. It was easy to place the order and received the part quickly.
Repaired:
On the day of the repair, I watched a video. The video was organized and well made.