68 105 95 80 90 100 67 88 90 75 78 94 75 70 84 98 102 70 110 120 95 80 76 108 112 92 78 82 84 69 a) Determine the number of classes and class width. b) Make a frequency distribution of the data. Include class limits, midpoints, boundaries, frequencies, relative frequencies, and cumulative frequencies, c) Solve for the mean, interquartile range, quartile deviation, variance and standard deviation. d) Display the frequency histogram and interpret. e) Describe the distribution shape