In a gymnasium, the weights of all people come to exercise will be recorded. One day the weights of 10 people were recorded as 5
8 kg, 70 kg, 59.5 kg, 62 kg, 66.4 kg, 72 kg, 81.3 kg, 75 kg, 83.3 kg and 75.5 kg. How many of them weigh more than the average weight? a) 4 b)5 c) 6 d) 7