I might write a story of my own and layout a couple of pages, including editing various wire stories or a locally written piece. Likewise the city desk, might have a dozen local stories. The sports desk usually only has a lot of a local stories on the weekend. This would be all in the morning. Also, the wire editor would lay out several pages.
Copy editors are usually reporters who have stayed long enough to have reported on several beats.
For some reason, the section heads are salaried, while everyone else is hourly. Since I'm not sure how to answer that question, I suspect the answer is no. 6. It all depends on personalities. Some section heads are very aggressive at rewriting reporter copy. All the copy editors do layout, as well.