Broken antenna

I have a 2000 Chrysler Town and Country and the radio antenna broke off. I bought a replacement antenna, but cannot figure out how to remove the old antenna. Any suggestions?

If it’s just the mast that’s broken, it just threads on to a post which is mounted to the fender. If the post is broken, the job will be quite a bit more involved. I’m not too familiar with this particular vehicle in that area, though, to give you the specifics on that job.