The acceleration of gravity at the object’s surface

The surface gravity of an object, which technically is the acceleration of gravity at the object’s surface, depends on the mass of the object and its radius.

1) You discover two stars, Star A and Star B. They both have the same radius, but Star B has a larger mass than Star A. Is the surface gravity of Star B larger than, smaller than, or the same as the surface gravity of Star A? Explain your answer.

2)  At some point in the future, the Sun will shrink so that its radius is about 100 times smaller than it is now, but its mass will be essentially unchanged. Will the surface gravity of the smaller Sun be larger than, smaller than, or the same as the surface gravity of the current Sun? Explain your answer.