Exercises: 12-2 12-4 12-8 13-1 13-4 13-8. Exercises: 12-

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    Exercises: 12-2 12-4 12-8 13-1 13-4 13-8.
    Exercises: 12-2 12-4 12-8 13-1 13-4 13-8.
    Attachments:

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