Could you help me with 17, 18, 19?

Question 17 (1 point) Can a rigid object rotate about its axis of rotation at constant angular speed if its net torque is zero? Yes No Question 18 (1 point) Which object has a greater moment of inertia? An object whose mass is near the axis of rotation or the object whose mass is mostly located at a distance r away from the axis of rotation. The object whose mass is farther away The object whose mass is closest to the axis of rotation both should be the same Question 19 (1 point) Saved In order for angular momentum to be conserved which of the following must be true The sum of the torques must be zero angular momentum is always conserved The sum of the torques must not be zero Kinetic energy must be conserved