Are my other eggs dead?

[Khaki mama]

Hi, this is my fist time incubating. One of our duck eggs hatched on day 28. We're now on day 30 and we were seeing no movement in the eggs so we candled them our eggs left are c,d,e,f. Egg e looks like this...

It has a weird shadow in the air sack.
Then there's egg F...

Are they dead. Only one of them hatched.

 

[AltonaAcres]

Yes, both look dead.