It looks like the nut you removed between 1 and 2 was a compression fitting, so the broken "chrome" piece should just slide easily out toward you. And when I say easily out, I mean you should be able to grab it with a pipe wrench or strap wrench and twist it to free it up, and then twist while pulling out with great difficulty. If it's a standard size, a new pipe with compression fitting should slide it once you clean up the opening a little.

https://i.imgur.com/LlaabfK.jpg