Tehtävä

https://docs.google.com/presentation/d/1XWwGrbdOKeCEoeZyy6DiBBbtpPZEq2M5hUS2i1unIvI/edit?fbclid=IwAR0LvaVmECrJHNoOePyqMnez3D72bU_ewOlhyyYgntg4ZmjMSsdSeS7zDHM#slide=id.g375e2e4a70_0_17