I'd say 150 or so and around 75 pounds for the second . Bear are one of the toughest animals to judge though , especially off a picture. With bear look at the ears and legs . If you see what looks to be big ears on top of the head thats because it's a small head. Big bears their ears will be smaller and more on the side of the head. As far as legs If you see skinny legs = small bear. For instance the attached pic is from a trail cam picture from a 450lb bear from two years ago.
