How many shots should I expect to manage my bulldog cheeks?

Lately, I feel like my skin is sagging a bit, like bulldog skin.

Maybe because it's the area around the mouth, the corners of the mouth are drooping as well, making the face look even more droopy.

How about Ultherapy for lifting these sagging areas?

To summarize regarding Ulthera, how many shots should I expect to need?

It seems like it will fill the sagging areas quite well. I am also curious about how long the effects last after the procedure.