Five cars travel for 45 minutes on straight flat roads without interruption. Information about their speeds and time at each speed follows. Car A travels at 1 km/min for 30 min then travels at 1.2 km/min for 15 min. Car B travels at 1 mi/min for 20 min then .8 mi/min for 25 min. Car C travels at 50 mi/hr for 25 min the 70 mi/hr for 20 min. Car D travels at 60 km/hr for 15 min and 80 km hr for 30 min. Car E travels at 60 mi per hour for 45 minutes. Which car has the highest average speed for the entire trip?