What you are being asked here is to think and "feel" how that joint works and what and where loads will be pinpointed to. Asking here for direction is totally contrary to the idea behind it. They spell it out for you, you are to think about this.
If you are pursuing a career in Engineering it is imperative that you can look at something and get a "feel" for what is or might be happening. If you do not have this innate ability, then Engineering may be a hard row to hoe for you. I don't mean to sound elitist, but unless you already have that "feel" for things mechanical, a lot of understanding problems will take much, much more work.