Provide an analysis of delayed flights based on the airport the flight originate

Provide an analysis of delayed flights based on the airport the flight originated from. your analysis should answer the following questions.
Is the distribution of delayed flights normally distributed?
Describe the shape of the distribution based on the QQ-plot.
What is the probablity a flight leaving from a given airport will arrive at its destination late?
Hint: Calculate the probablity of late arrival at destination for each originating airport.
Determine the originaing airport with the largest proportion of flights arriving late to their destination.
I already cleaned the data and it just have a small number of missing values. All what I need is answering the first question because I am not good in math and Statistics. I know the price is low but the I have done a lot already, I only need an answer to the probability question above. I have all the files. Thank you.

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