Sink Stoppage in Sedro Woolley, WA

We got a call about a stopped up bathroom sink (aka basin) in a small rental house off Hwy 9. I tried to clear the stoppage through the trap for about 15 minutes, but it wouldn't clear. Mind ya, this bathroom is about 6 feet wide, so it should have cleared quick enough.

I crawled under the house and found this and yea, I did replace the pipe and a few other leaks:

Broken drain pipe