She is a genius.
How to say this in French? If "genius" were a profession, we would say
Elle est génie.
But since "genius" is not a profession, I think we need an article. But I'm not sure whether we should say
Elle est un génie.
C'est un génie.
Also, how can we translate the same sentence but with the pronouns "I" or "you"?
I am a genius.
You are a genius.