Given this group of numbers: 65, 68.5, 68.5, 70, 72, 81.5, 93. Choose the following set which represent the mean, median, mode and range respectively?

a) 74.07, 70, 93, 7

b) 74.07, 70, 68.5, 28

c) 70, 74.07, 68.5, 7