DDongjoMay 25https://drive.google.com/open?id=12pZiWhegqmtE3dPo4x0JGPT879xMAO77&usp=drive_copy https://drive.google.com/open?id=12pZiWhegqmtE3dPo4x0JGPT879xMAO77&usp=drive_copydrive.google.com
DDongjoMay 25https://docs.google.com/presentation/d/1PzHxj25eCwLys2Yf2ikFioew9mdJ57m97LvzWIl0OLE/edit?usp=drive_link https://docs.google.com/presentation/d/1PzHxj25eCwLys2Yf2ikFioew9mdJ57m97LvzWIl0OLE/edit?usp=drive_linkdocs.google.com