New Ungraded notebook

Hi I need a new Ungraded Jupiter notebook for week1 in Linear algebra course. As I have made some changes in code Iam unable to revert it

Hello @Navaneeth1 and welcome to the deep learning community!
Please check out this thread: How do I reset the notebook Let me know if your problem will be solved!

Actually I accidentally reset the checkpoint so even after refreshing its not reverting back to the original one

This is the link that I used and refreshed

@Navaneeth1 Please also try the solution in this thread on how to get a clean copy of the assignment: How to Get a Clean Copy of an Assignment Notebook