IMathAS-libretexts

Which of the following are equivalent to the following statement:

Staying up late but not drinking coffee is sufficient for not staying awake in class.

If I stay up late but drink coffee, then I will stay awake in class.
If I can't stay awake in class, then I stayed up late but didn't drink coffee.
If I stay up late and don't drink coffee, then I will not stay awake in class.
I can stay awak in class if and only if I don't stay up late or I have coffee.
I can't stay awake in class if and only if I stayed up late but didn't drink coffee.

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