https://drive.google.com/file/d/1FB_RlyprqbDx_VKQPCN2BNSTqPQIlhJ6/view?usp=sharing https://docs.google.com/drawings/d/1wQpb5sjnQip8bnEmk_I-pteAqTFe266_U0C88L_oVBs/edit?usp=sharing
