cau vicky

https://drive.google.com/file/d/1hD0aoajw57P1_aFS4fECSilkhBOeoDaT/view?usp=drivesdk

https://drive.google.com/file/d/1fuyTdcsK1RJkI69p5BqWP0ZSUvQcxkkX/view?usp=drivesdk

 https://docs.google.com/presentation/d/1EhXZjXuEDuojVuj0Mdr_A-3RlV9DlKbqigtWw8zmSDo/edit?usp=sharing