Okay, here goes. : )
Left Column:
Cockerel- Because he's a got a bigger, more pink comb and stands like a roo.
From top to bottom in second photo: cockerel, pullet, pullet - same as above for the roo. Pullets have smaller, not quite developed combs till they get near laying age.
I'm not sure- though, I'm almost leaning torward cockerel just because of how it's looking at you. Of course, it could've just been the wrong shot at the wrong moment. : P
Middle Column:
I'm not sure
Pullet - small, undeveloped comb
Cockerel- He just seems to have a roo look about him. Also, because I have never seen a black and white EE pullet, yet. : )
Right Column:
Pullet- small, undeveloped comb
Hope that helped some! : )