They all look like pullets.
Here are a couple of pics of our reds at 12 weeks. The first pic is of "Cheese" and the jury is still out on whether he/she is a rooster or not. Cheese has a redder and larger comb/wattles than the other two, but not as large as I would have expected for a rooster. The second pic is of "Mrs. Puff" an "Jen the Hen" (my children named them all) for comparison, with cheese in the back left.