Uneditable Cell

Very interesting situation going on here. There is one cell I cannot edit after my Week 1, Course 2 assignment was graded. How can I fix this ?

Here are the steps:

  1. Open the notebook.
  2. From the menu, click View > Cell Toolbar > Edit Metadata. Now, an Edit Metadata button will appear on top of each cell.
  3. Click this button on the cell you want to edit.
  4. Change value of “editable” key from false to true and click Edit to save changes.
  5. Now, you can edit contents of the cell.
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