An object was launched upward from a platform. The graph shown models the height above ground, , in meters, of the object seconds after it was launched. Which of the following statements about the object's motion is true?
The object traveled a greater vertical distance during the first second than during the last second it was in the air.
The object's average speed during the first 2 seconds was greater than its average speed during the next 2 seconds.
The object was at a height of 20 meters at two different times.
The object's height increased at a constant rate between and .
