Julian has an image that measures 12”x18” in size. He knows that he will need background support that is approximately the same size as his image and that his overmat will need an additional three inches on all sides. Based on this, what size overmat will Julian need? (1 point) Responses at least 18”x24” at least 18”x24” at least 24”x32” at least 24”x32” approximately 16”x18” approximately 16”x18” exactly 12”x18”