diff --git a/03.Basic_Concepts_II.pdf b/03.Basic_Concepts_II.pdf index 4ce2eaa..503ab72 100644 Binary files a/03.Basic_Concepts_II.pdf and b/03.Basic_Concepts_II.pdf differ diff --git a/04.Basic_Concepts_III.pdf b/04.Basic_Concepts_III.pdf index dd50b17..d99292f 100644 Binary files a/04.Basic_Concepts_III.pdf and b/04.Basic_Concepts_III.pdf differ diff --git a/05.Basic_Concepts_IV.pdf b/05.Basic_Concepts_IV.pdf index 5bb48dd..759d993 100644 Binary files a/05.Basic_Concepts_IV.pdf and b/05.Basic_Concepts_IV.pdf differ