At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.1 m/s2. At the same instant a truck, traveling with a constant speed of 9.5 m/s, overtakes and passes the automobile.

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.1 m/s². At the same instant a truck, traveling with a constant speed of 9.5 m/s, overtakes and passes the automobile.
(a) How far beyond the traffic signal will the automobile overtake the truck? 
(b) How fast will the car be traveling at that instant?