CarharttWomen's Active Jacket

5”9 180 what size. I want to wear a hoodie underneath it?

I am 5'3 and 120 pounds, i would like to be able to have at least one layer underneath. i usually wear xs or s, should i get a m?

Does this jacket actually cover your bum or does the picture just make it seem like it does?

Is there elastic at the wrist?