Hello, leetcode community.

Could you teach me how to solve OOD questions?
(such as "design elevator", "design parking lot", "design minesweeper")

I want to know the way you solve this kind of questions.
I think it's like

1. decide which object you use
2. decide how each object communicates with each other
   etc...

I studied SOLID principle, GRASP, and something like that, but I can't solve it.

Thank you.