9 - https://docs.google.com/document/d/16JWt2kp8s4hO7gKIr2yIQ0-_JtKM_MB_qRjDTfy5wkw/edit?usp=sharing
10 - https://docs.google.com/document/d/1SR055hcXNOFr4rElxp2lwOG84TXY4k61aDkGkRAXnJI/edit?usp=sharing