A hot air balloon rising vertically is tracked by an observer located 2km from the lift- off point. If the angle 9 between the observer's line-of-sight and the horizontal is changing at a constant rate of 0.1 radfmin. Which statement is true? {3:}. The balloon is rising at a constant speed .g' :3. The balloon is rising faster and faster (Ft). There is not enough information to determine the speed of the balloon. .\" "3. The balloon is rising slower and slower