How to add Software Architecture Column in Activity Monitor

When the activity monitor is opened from the Utilities Folder (or in my case the shortcut on my dock), right hand click (or alt/option click) on the blank space beside the user column. A list will appear, click on 'Kind' to tick it. A new column will now appear, you can now see which processes are 32 and 64-bit.

Which user process started first?

On my Macbook, the first user process is titled 'bird'.