I hope that you are able to edit and use these charts. Begin by enlarging the Excel Workbook using the icon at the bottom right corner. Click in any data cell.
You will need a “onedrive.live” account, but you can set one up for free. 
Then look for the “Edit Workbook” button, top right of your screen, to get started. Select the tab with a chart presentation to suit your task. Edit the table.