added a brief introduction to the problem, ran the notebook

[pawelmagnu]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.02%. Comparing base (322a5f2) to head (84839bc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #462   +/-   ##
=======================================
  Coverage   92.02%   92.02%           
=======================================
  Files          30       30           
  Lines        1468     1468           
=======================================
  Hits         1351     1351           
  Misses        117      117           

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