Update 04_INT/tutorial_4_part01_lagrange.ipynb, 04_INT/tutorial_4_part02_lokale_interpolation.ipynb, 04_INT/tutorial_4_part05_interpolation_anwendungen.ipynb, 04_INT/tutorial_4_part01_lagrange_example.ipynb, 04_INT/tutorial_4_part03_4_hermite_splines.ipynb