finished methods getCarPosition, getCarVelocity and get CarID

src/main/java/ch/zhaw/pm2/racetrack/Game.java

@@ -53,8 +53,7 @@ public class Game implements GameSpecification {
      */
     @Override
     public char getCarId(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return track.getCarId(carIndex);
     }
 
     /**
@@ -64,8 +63,7 @@ public class Game implements GameSpecification {
      */
     @Override
     public PositionVector getCarPosition(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return track.getCarPos(carIndex);
     }
 
     /**
@@ -75,8 +73,7 @@ public class Game implements GameSpecification {
      */
     @Override
     public PositionVector getCarVelocity(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return track.getCarVelocity(carIndex);
     }
 
     /**