u/InevitableBubbly2465

So I've gotten my first art request for a digital drawing on DeviantArt like 2 days ago. It's from another DeviantArt artist who wanted me to redraw some of their work in my style. We've already discussed the deadline and what to draw. I was excited at first but after accepting this request I realized there is so much I'm not sure about. What I already know is that for art requests, the artist has full rights for the finished piece, as opposed to paid commissions where the rights are passed on to the client (correct me if I'm wrong).

Here are two things I need to know:

1. Do people normally put their own watermark on the drawing? Is it something that should be discussed with the client?
2. Could I post the art on my own profile, as long as I provide a link to the client's profile?

Edit: I forgot to add that it is a free art request. I'm not getting any money from this.