Question: Write a text file, regex.txt, that contains the three regular expressions required to produce the results: a) Lines that contain A or a at some

Write a text file, regex.txt, that contains the three regular expressions required to produce the results:

a) Lines that contain A or a at some index m, and Z or z at some index n, where n > m.

b) Lines consisting solely of US postal code, allowing both the five-digit and nine-digit (called ZIP+4) formats.

c) Lines containing nothing but a decimal number between 0 and 211, inclusive.

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