Calories you burn when running

After spending the holidays with your family you have put on a bit of weight. You decide to go running and do a 6km long run on flat terrain. You are wondering whether you should run the distance at a fast or a moderate pace to burn more calories. You go online and read that a 59 kg person burns 590kcal running at 9.7 km/h for an hour and 767 kcal running at 12.9 km/h for an hour. So should you run the 6 km at a fast (12.9 km/h) or a moderate pace (9.7 km/h) to burn more calories?(a) Calculate the calories you burn when running at a fast pace (in kcal)(b) Calculate the calories you burn when running at a moderate pace (in kcal)