A few oddly specific textbook-callback-figures to help you remember the rules.
I woke up too early and had a few hours to spare. Sorry.
https://lemmy.world/pictrs/image/0f06b08a-ff18-40d0-ad92-cd87e2637128.jpeg
https://lemmy.world/pictrs/image/4b61e2ed-f792-405b-8480-c9aec1e0d0a5.png