How to reset my Jupyter Notebook to default ?Also how do i overcome Grading errors?

Grading error.pdf (131.1 KB)

This link explains how to reset the workbook to its original state:

About the errors you have to locate where the mistake is along when running the cells and respective tests, and solve the problems as they arise!

Thank you very much

The grading error from last night was due to a fault in Coursera’s backend.
That’s been fixed.

Any remaining issues are with your code.

Ok thank you!