Dear Eng. Mariam ,
Kindly find the following attached photos for reviewing the attached macro code in the attached excel sheet in this lesson
you can simply do it with the following steps
1- open the excel sheet
2- right click over the sheet name
3- click on view code
4- under the Modules you will find “Module 1” , open it and you can view the code
5- if you want to run it just press F5
All the mentioned steps above are in the attached photos also.
Regarding the attached after download it just right click and chose “Extract to/” option and you will find the sheet , also attached photo for this issue