I'm going to go out on a limb here...
#1 sure looks like a roo based on the comb and wattles...
#2 & #3 could go either way at this point. I'm leaning towards pullet on #2, but give it a few more weeks. In some breeds the hens have big combs too, so it's really hard to tell. Unless you hear someone crowing, I wouldn't make any decisions for at least 3-4 more weeks.
The best photos are full body (comb to the toes) side shots, clear, so the hackle and saddle feathers can be seen clearly.
I can't make out the saddle feathers either. But I could not see any black chest on the Welsummers. I went outside to look at my welsummer hens. There combs are all different sizes. Some even larger than my Roosters.