Excel Multi-Series Line Graph

I have an existing Excel file that already contains all of the numerical columns I need to visualise. I’d like you to build a single, well-formatted line graph inside that workbook that pulls in more than two data series and presents them clearly on one set of axes. In addition, please add concise annotations (text boxes or call-outs) at the specific points I flag so that key trends or milestones are instantly visible. There are two different tables for which two different graph to be made in excel.

Native Excel chart tools are fine—no macros or external add-ins necessary. The chart should update automatically when I change the underlying numbers, keep a clean colour palette, and include an easy-to-read legend. Once finished, send back the same workbook with the chart embedded so I can plug in fresh data and have the visuals refresh on the spot.