How would I solve for(adsbygoogle = window.adsbygoogle || []).push({}); aon a question like this: P(0 < z < a)=0.2 ?

I know that for a question like P(z < a)= 0.85 I would find the inverse-norm of 0.85 to solve fora. I've tried the same thing for the first question, but of course it doesn't work and I'm out of ideas as to how else I should try and solve it. :yuck: Could someone please help?

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