If you used the element, “enclosure”, what would you be attaching to the item?

Which of the following <item> child element is used to specifies a third-party source for the item?

Which of the following <channel> child element is used to define the e-mail address to the editor of the content of the feed?

Which of the following child element allows a media-file to be included with an item?

In the following excerpt of a RSS document, what does the value to <ttl> signify : <channel>   <title>Test Home Page</title>   <link>http://www.myrssfeed.com</link>   <description>Sample RSS Feed</description>   <ttl>60</ttl>

What is the purpose of the <source> sub-element?