Lesson over 2.1 and 2.3: https://drive.google.com/file/d/1n3z3VnqlneVq5IHgEKd3IvPbbMo_4mtx/view
Lesson over 2.5: https://drive.google.com/file/d/1mrGfQyEDy4B0cUIrF1pe3Q61Baa2VG-V/view
Lesson over 2.6: https://drive.google.com/file/d/1oXJMepd3p1yIMzL_HBAEHt0NffSua42p/view
Lesson over 2.7: https://drive.google.com/file/d/1d5w4tfVDO40QTcVVHtkgvpFke387T6Gf/view
Lesson over 2.8: https://drive.google.com/file/d/1yAjkM_-dpUOCwDSgL5RlbLUKjDxRo_Wb/view