X-21. Consider the diagram below. KE = 5 000 J A PE = 20 000 J B KE = 12 000 J PE = 13 000 J KE = 20 000 J KE = 25 000 J D PE = 5 000 J KE = 25 000 J C PE = 0 J E PE = 0 J The kinetic energy and the potential energy of a car at various locations are shown. The total mechanical energy of the car at position B is Joules. a. 0 b. 1000 c. 7000 d. 12000 e. 13000 f. 20000 g. 25000 h. 125000 i. None of these