Agree the first two are cockerels. I'm undecided on the third bird. Giants can be slow to mature, so that comb could go either way at this point.
The bottom two do look like pullets.
I was thinking first 2 male, 3 and 4 I was unsure and just call them the twins, no name for now. They are chill so was hoping pullets. 5 We figured pullet. This is my first time owning chickens. I love it ! Was hoping we could find out amount of cockerels before they hit 4 months as we will need more pullets. We only have 15 chickens total right now. Thank you for your reply's !!