chameleon
Chirping
No. 1's comb looks a little supsicious, but I'm not an expert. I found with mine it was hard to be sure until around 8 or 9 weeks, when the cockerel's feathering was clearly lighter than the others and he started challenging my other cockerels. His comb and wattles also only really started to develop then. At 5 weeks I had a couple of pullets who's combs looked bigger and pinker like your no. 1 but turned out to be girls after all. Someone with a better eye might help more, but I'd give it another 3 or 4 weeks to be sure.