diff --git a/module3/exo3/Playfair_Graph_Analysis.pdf b/module3/exo3/Playfair_Graph_Analysis.pdf new file mode 100644 index 0000000000000000000000000000000000000000..7f9fd0ad32f0e47c852e752af3f2b3ffd60a5319 Binary files /dev/null and b/module3/exo3/Playfair_Graph_Analysis.pdf differ