Help with 1981 Proof coins

I was looking at my 1981 proof set recently, and I was trying to figure out which (if any) coins in this set might have the type 2 mintmark. I think the nickel does, and possibly the half dollar, but it's really hard for me to tell, even after reading some of the documentation like Ken Potter's. Anyone willing to venture a guess on these mintmarks? They run from the dollar on the left to the cent on the right...