Page 15, ex. 1, 2, page 16, ex. 2
Ex. 1
https://drive.google.com/file/d/17tJu2MaCqiOn0HfscW80-4D74ubnAGof/view?usp=sharing
Ex. 2
https://drive.google.com/file/d/1rhG-iBDW-pUAoXIzshKpIooCuPjivT_y/view?usp=sharing
Page 16, ex. 2
https://drive.google.com/file/d/1Yl0Uef-bbncIYxZxdy5mrobVS4hlNlbc/view?usp=sharing