Question: Write a function parentDir() that obtains the absolute path for the parent directory/folder relative to the execution directory of the current notebook. While it is

Write a function parentDir() that obtains the absolute path for the parent directory/folder relative to the execution directory of the current notebook. While it is permissible to change the current working directory as part of your solution, upon completion of the function, the current working directory must be the same as it was before the function was called.

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