d} Draw a histogram indicating midpoints of classes and describe the shape of the distribution. Label both axes and indicate the scale on each. e) Estimate the mean and the median height using the frequency table shown. Explain your results. 3. Radar was used to check speeds on a random sample of 20 cars in rush-hour traffic on an Atlanta expressway with the following results (in miles/hour) 50 60 48 60 56 55 60 58 50 72 55 40 45 99 50 60 55 33 55 77: a) What is the quantity of interest? Is it categorical or numerical variable. Is it continuous or discrete? b) Make a Stem-and-Leaf plot for those speeds c) Make a frequency table using intervals: (30, 40], (40, 50], (50, 60], (60, 70], (70, 80] (30,40] means: 30