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    Agreed, I'm not sure this should be labelled 'Easy', at least. Had to ensure that I split the string appropriately, convert them to formatted lists, and then use a dictionary to store the information efficiently.

    And throughout, you have to ensure you're utilizing 'N' properly, and accounting for the fact that there might be more than 3 grades for a given student.

    Calculating the mean was the only real 'Easy' part.