Aspy is running across the bridge of an aircraft carrier. the spy is moving with a velocity of - 4 m/s relative to the carrier. however, the aircraft carrier is moving with a velocity of 12 m/s. there is a person standing stationary on a beach watching the event. what will be the velocity of the spy according to the person on the beach? 8 m/s 6 m/s -4 m/s -7 m/s