Question: Create a new data frame new _ df which extracts only Ozone and Wind observations from air data, but only those which were recorded in

Create a new data frame new_df which extracts only Ozone and Wind observations from air data, but only those which were recorded in September (Month =9). Your code should have only one line:
new_df =???
Hint: your data frame should be of dimension 30 x 2.

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