$1.[30\%]$ Load the flights dataset into a pandas DataFrame:

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a$.$ Display the first five rows and check the basic structure of the dataset $($e$.$g$.,$ number of rows, columns, data types, and general summary$).$

b$.$ What insights can you draw from the initial structure of the data? Are there any immediate data quality issues such as missing values or incorrect data types?

c$.$ How many duplicate rows exist in the dataset? If duplicates are present, remove them and describe how this impacts the dataset.