I agree that number 1 is a roo, and I'd say the jury is still out on number 2. Pretty red for only 3 1/2 weeks. What do #2's wattles look like? The streakiness of #2's back feathering looks more like a roo.
In the second picture it looks like there's more of a chance of it being a pullet. Are they from a hatchery or a breeder? That can make all the difference in how their lacing is going to be.