Edit entry meta

I am using twentythirteen child theme. How do I edit the placement of the entry date, author, and comment counter? These usually appear below the post title or after the post.

I want the Post Date, category of post, and author to appear right below the post title.
And I want the comment counter to appear below the post.

BTW this occurs when on the Home page and I see my recent posts with the title and brief summery.