Excel Line Graph Creation

I have a dataset in an Excel sheet that needs to be turned into a clear, well-formatted line graph. All the raw numbers are already available; what I need from you is data cleaning (if required), thoughtful grouping or re-ordering where it improves readability, and then the actual construction of the chart using native Microsoft Excel tools so the file remains fully editable on my end.

Once the visual looks polished, add labels, a concise title, and any necessary axis formatting so the story behind the numbers is instantly obvious to a non-technical reader. Please keep colours consistent with default Excel palettes—nothing custom that breaks if the file is opened on a different machine.

Deliverables:
• The updated .xlsx file containing the organised worksheet and the finished line graph
• A brief, one-paragraph note inside the sheet (or as a separate tab) describing the steps you took and any assumptions you made

I will review the visual by overlaying a few scenario numbers to confirm the chart updates dynamically. If everything refreshes correctly and remains legible when printed on A4, the task is complete.