Question One The marks obtained by 40 students of BBA213 class at Cavendish University Zambia are presented in the table below. Marks obtained 0 18 32 40 52 56 58 67 71 80 92 100 Number of students 3 2 1 5 9 2 4 6 3 2 2 1 a) Group the above data using five as the number of overlapping classes. b) Find the mean of the grouped data. c) Find the mode of the grouped data. d) Find the median of the grouped data. e) Find Pearson's coefficient of skewness of the grouped data