I'm a pizza - What you say when someone tells you something so obvious it

What you say when someone tells you something so obvious it makes you want to scream into a pillow.

I'm a pizza! You told me the sky is blue and I was like, ‘duh.’

I'm a pizza! My friend said I was gonna fail and I was like, ‘obviously.’

I'm a pizza! My teacher said I was lazy and I was like, ‘tell me about it.’