My sincere apologies for the vague answers. So here is what I did.
a. I copied the following example.com/blog/wp-content/themes/default/style.css
into my the URL location field of my browser and hit enter.
All I could see in the browser was the CODE for the style.css file. Looking at the first few lines of the code, it seemed to be referencing the default wordpress theme.
I did not check anything with Firebug (I have to plead ignorance on what that is!).
Once again, thank you for your help with this. Any additional input from your end would be VERY helpful.