Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
First you need to Freeze the header :
http://www.wikihow.com/Add-Header-Row-in-Excel
then you select Data grouping according to what you need to group
http://www.wikihow.com/Group-and-Outline-Excel-Data
https://www.youtube.com/watch?v=0V4G7H2u538
Group.xlsx