RSS FEED for wordpress 3.4.2

Trying to determine the feed url for my wp blog.

tried the following urls and none work:

http://www.myblog.com/feed/
http://www.myblog.com/feed/rss/
http://www.myblog.com/feed/rss2/
http://www.myblog.com/feed/atom/
http://www.myblog.com/feed/rdf/
http://example.com/?feed=rss
http://example.com/?feed=rss2
http://example.com/?feed=rdf
http://example.com/?feed=atom

also tried locating the feed url in the code of the template

I looked in the footer.php,sidebar.php and the header.php and can’t find anything related to rss feeds in these locations so I am wondering if I need to add code for the feed? I thought it was built into wordpress automatically no matter what theme you are using

any advice would be highly apopreciated