Paul McCartney post-Beatles - Part 1

When I think of Paul McCartney's post-Beatles oeuvre in the 70s, I think of four songs in particular.  Yes, I know he had more than four hits, and I know that these weren't even necessarily his biggest four hits.  And none of them are any less than 30 years old!  But they're the ones that jump to mind for me immediately.  I was going to cram these all into one post, but this is my blog, dammit, so let's start a four part series!