file pdf : https://drive.google.com/file/d/1ikO7RIR1_mbN2iGBNYtg392l5DoZ4FKf/view?usp=sharing
file pdf : https://drive.google.com/file/d/1dtwtDEefJr3ap9SoTRRjDGmAawK70DhO/view?usp=sharing