completing TODO parts.

src/main/java/org/util/VehicleInspector.java

@@ -1,6 +1,9 @@
 package org.util;
 
 import org.*;
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
 import org.model.Vehicle;
 
 /*
@@ -18,5 +21,17 @@ public class VehicleInspector {
         // If ElectricCar → print "Check battery system"
         // If SportsCar → print "Check brakes and performance"
         // If GasCar → print "Check engine and oil"
+        if (v instanceof ElectricCar) {
+
+            System.out.println("Check battery system");
+        }
+        else if (v instanceof SportsCar) {
+
+            System.out.println("check brakes and performance");
+        }
+        else if (v instanceof GasCar) {
+
+            System.out.println("Check engine and oil");
+        }
     }
 }