For the I to Z, I’m not entirely sure, but it doesn’t seem too ridiculous.

As for why it was flipped, it’s because Phoenician was right to left, and Greek/latin are descended from it, but they are left to right instead. I guess the ancient Greeks/Latin tribes didn’t bother just fixing the letters. They eventually catched up and flipped it later on, though.

Language evolution is wacky, but beautiful :)

i wasn’t an i. It was a different sound represented by a sign that resembled i.