You'll get good advice over at MIMF but they may be more concerned with doing it correctly I'd be the same though.
It's also got a bit slow over there of late I haven't checked in for months.
As for the problem at hand. Ouch....First a BIG proviso. Make sure you don't have a slipper heel in that. Those things often do. If so report back. If not read on....
Those breaks are not nice. Take the strings of now then supply more details.
Is the split effecting the end block? Has the neck come free of that? Is it a tenon or dovetail joint. Which brace is loose? Does the whole thing close up if cleanly if you manhandle it nack into position? Careful with that one. Clamping isn't a problem. There are plenty of ways to do that once you know whatyou going to be doing first Klemsia for the heel, masking tape for the top/side, closing clamp for the rib. Glue you'd want either Titebond Original or hot hide glue.
I'd want to be taking the neck off to do it properly though unless everything goes back easily and perfectly. The main reason for that is that the neck joint is a critical structural area and half baked repairs always fail eventually round that area.
What I'd do.
Remove the neck after separating the top and ribs enough to get it out.
Repair the cracked rib, repair and refit the neck heel and reglue the top.
As said a lot will depend on the nature of the neck join and how clean the break is.