An unattended car rolls slowly across an empty parking lot. Consider the following two cases: case 1, the car hits a light pole and comes to rest; case 2, the car hits a pile of plastic garbage bags and comes to rest. (a) Is the impulse in case 1 greater than, less than, or equal to the impulse in case 2? (b) Is the average force in case 1 greater than, less than, or equal to the average force in case 2?