When employing a private cloud, how would you minimize the risk of sensitive third-party (end-user) data being leaked?

The file sales data.xlsx contains monthly sales amounts for 40 sales regions. write a sub that uses a for loop to color the interior of every other row (rows 3, 5, etc.) gray. color only the data area, columns a to m. (check the file colors in excel.xlsm to find a nice color of gray.)

Which type of file can be used to import data into a spreadsheet?

To maintain clarity and focus lighting might be needed