So basically what you have to do is subtract the above ground level (1) with ground level (4) and you’ll get 3 which is negative bc it counts as below ground level . Now that the car rises 13 meters subtract 13-3= 10 and add it with the other ground level 6 meters . 10-6=4

So basically what you have to do is subtract the above ground level 1 with ground level 4 and youll get 3 which is negative bc it counts as below ground level N class=