Kinematics Analysis: Interpreting Speed-Time and Acceleration-Time Graphs

The diagram shows the speed-time graph of two cars \(A\) and \(B\) during a period of \(20\) seconds.

Calculate

1. the acceleration of car \(A\) during the first \(6\) seconds of its motion,
2. the average speed of car \(A\) during the \(20\) seconds of its motion,
3. after how many seconds will car \(A\) travel at the same speed as car \(B\).