Question $3(3$ points$)$

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For a Normal distribution with mean $0$ and standard deviation $1,$ which of the following Python lines outputs the critical value $a$ if $P(z>a)=0\mathrm{.}818?$ Note: $a$ is a constant. Select one.

import scipy.stats as st print$($st$.$norm.pdf $(0\mathrm{.}818,0,1)$

import scipy.stats as st print$($st$.$norm.cdf$(0\mathrm{.}818,0,1$

import scipy.stats as st print$($st$.$norm.isf $(0\mathrm{.}818,0,1)$

import scipy.stats as st print$($st$.$norm.ppf $(0\mathrm{.}818,0,1)$