“Post 2 does a good job of explaining it.”
Oh, you are right. I should have looked at the video in Post 2. Straight forward. Thank you.
This guy is good too:
https://m.youtube.com/watch?v=EkOFel7nRoY&pp=ygUldGhlIG1pcnJvciB0cmljayB0aGF0IGZvb2xlZCBtaWxsaW9ucw%3D%3D