3. The following data represents the weight (lbs) of 30 randomly selected adults.

120 220 189 111 145 167 124 177 150 167 205 178 184 193 167 182 133 179 267 163 185 192 204 138 145 178 171 180 160 187

a. Create frequency distribution table with class width 20. Use [110, 129), [130, 149), etc. as the bins or classes.

b. Construct a histogram summarizing the data.

c. Describe the shape and the modality of the histogram.