WEEK 3 LAB assignment solution

Anyone who has done Week 3 lab assignment? I need some help

Hello @Muhammad_Azhar_Ghaur
Welcome to the community!!!
Kindly post the complete error trace here, So that mentors or fellow learners can help

I need to restore my lab file as again, as I have made changes and save it unfortunately, how can I do this?

See Item 09 in this FAQ thread: