making a normal qq plot with 2 data sets in 1

hello, I need to make a normal quantile-quantile plot but I have two sets of data being preflight and post-flight (all numeric values). but I'm not sure how to do this. thank you.

Hi, it would be good if you could share your code so that we can see what you have tried.

However, maybe you could use one of the examples here:

https://mgimond.github.io/ES218/Week05b.html

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