Okay. Thank you Judith

Here's the link to the Github gist. File handling was not included for better clarity to a 5-year old. https://gist.github.com/emmiiorji/d6426bd2456f8d330cd481ca83167a0f

The function receives both emails as string inputs. It checks emails in the general emails string that are not contained in the emails of those that submitted the assignment by utilizing the filter function. The emails are also converted to small letters in case there is a mix of cases. It is expected that the file is downloaded in CSV (character-separated values) and the strings copied as inputs to the function.