Out of the first set chick #2 is a full giant because of its upright apperance and frame, beak and leg coloring. In the next set chick # 2 is a full cornish because of conformation, shorter tight down around face and leg and beak coloring.
Now in the first set chick Pic #1 is a mix because all though jersey giants feather out jet black they usally have more white as chicks. #3 has bright orange legs and beak which I think is incorrect. In set 2 chick #1 has the frame of a giant, not compact enough for a cornish and it's legs and beak are too light.