Question 1202162
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        Tutor @Theo in his post provided the answers, but did not provide the method.



Use online free of charge calculator for normal distribution at this web-site


https://onlinestatbook.com/2/calculators/normal_dist.html


This calculator has convenient, user-friendly interface, intuitively understandable
from the first glance.  It ideally fits for quick calculations,
and it ideally fits to be an excellent teacher/instructor for such calculations.


Find the answers in the post by @Theo to this problem.