Four flowers -- are two of them Dahlias?

I'm guessing that the first two of these four are Dahlias, but am not sure. Can anyone verify, and also identify the next two?

Thanks,
David

 

looks like two dahlias, a clematis and another dahlia.

 

Thanks for the quick reply!

Thanks. That was quick!

- David

 

First two are no doubt dahlias, the fourth as well. The fourth is an informal decorative bloom. The third could even be a dahlia, it's hard to tell without being able to see the foliage. Not all dahlias are loaded with lots of pedals, some are quite simple!