The following data gives the distances that a sample of Johannesburg car owners drive during one week. Distance driven (km) 114 69 91 24 61 107 110 120 42 146 255 95 143 110 77 281 146 266 120 85 144 106 149 373 150 95 66 130 125 103 87 (a) Compute the mean, mode, median, range, standard deviation, variance, coefficient of varia- tion, lower quartile, and upper quartile of the data using the formula bar and attach a screen- shot of the spreadsheet with the data as well as the values calculated. [Use the formulas, not the Excel analysis toolpak] (20) (b) Use the Excel analysis toolpak to obtain the same descriptive statistics of the data and attach the screenshot of the spreadsheet including the output. (15) (c) Calculate the 90th and 10th percentiles of the data set. (5)