I need to display children or siblings of the current page. I'm new to Drupal and haven't quite gotten the hang of even presenting all pages on the site, but in this particular case, I'm interested in showing doing the following:
Displaying only the next level of children for my current page
Displaying siblings of current page
I'm not interested in doing these at the same time, but in two different functions programatically.
So, for example, if my hierarchy is like this: