Going by the shape of the head and beak, I'd guess it's a Merlin. No visual clues as to size, so that makes it a challenge. Thought it might be an immature Coopers but the head/beak isn't right for that nor a redtail, sharp-shinned. Body shape/color doesn't look right for a red shouldered. A kestral has bigger/buggier eyes.
I don't think so, they don't get the gray in the tail feathers until year 2 and by then the eye color is different. The head doesn't look right either, the goshawk seems to have a gradual slope to the beak, more buteo-like.