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Exercise 3
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.. toctree::
   :maxdepth: 1

   exercise_3.1.ipynb
   exercise_3.2.ipynb
   exercise_3.3.ipynb
   exercise_3.4.ipynb
   exercise_3.5.ipynb
   exercise_3.6.ipynb
   exercise_3.7.ipynb
   exercise_3.8.ipynb
   exercise_3.9.ipynb
   exercise_3.10.ipynb