all would be suss on all the coins to be honest with you, I would have to inspect in the hand, as high grade fakes of these have been made. Also the a huge amount of low grade fakes of these coins.
Problem is that coins images aren't high enough resolution to tell if genuine or not.
For the first coin would be worried about the beading not showing through however that can be due to wear of the coin. Aleast words are correct on this coin however I would inspect the typeface worried about the 3,
for 2nd coin there are a few details that you should look at to or be aware of to examine to know that's genuine or not, they are too small on the image to see clearly.
The memento dollar almost certainly a fake as well however that just based on how rare they should be compare to the amount of fakes, note also some detail I reckon aren't up to par
The fat man dollar coin is almost certainly fake, could be wrong and it could just happen to have that weird flat looking wear.
Last Junk dollar is hard to say however like the Trade dollar
there are a few detail that if you know you would look at (pictures are good enough to tell) to try to determine authenticity.