Restrict viewing of pages, hide pages in menu based on user role?

Hi thanks so much for reading. I have a straightforward goal and I'm a little bewildered at the best module combination to accomplish my goal.

Based on user Role, I would like to:
1) restrict access to certain Pages (resulting in an Access Denied if viewed) as well as
2) hide links to these restricted Pages in the Primary Links menu. (i.e. some links don't show up depending on your role)

All Pages on my site (there are only about 20) are in the Primary Links menu. I want to avoid creating and maintaining multiple Menus.

What is the best module or setting to accomplish my goals?

THANKS for your time!