Conditional multiple switch using boolean in variables

Hello, I came here to ask a question because I had difficulty setting up multiple button conditions using variables in Figma.

1. When button A is off, if you turn off button B, button C will turn off.
2. If button A is on and button B is turned off, button C remains on.

Where did I make a mistake in my settings? Do you guys know any YouTube or tutorial pages you can refer to?