The following data represent the ages (in years) of motorcyclists at the time they were fatally injured in traffic accidents. 17, 38 27 14 18 34 16 42 28 24 24 40 20 23 31 37 51 21 25 a) According to the "2 to the k" rule, how many classes should be used to organize this data into a relative frequency distribution. 8 b) According to the number of classes determined by the "2 to the k rule", which of the following is an appropriate class interval? Enter the letter corresponding to your answer. 8 A 5 B. 6 C. 7 D. 8