I think #2 & #5 are roos. I am no expert but based on my 4 BCMs, two have small yellowish combs and two have red larger combs. The ones with the redder larger combs have more coppering coming in and their black feathers are turning bluish green. My "roos," however, are smaller than the girls but also hatched about over a day later. Mine are younger than yours but the presumed boys really do seem different than the presumed girls.