The article cited in Example 1.2 also gave the accompanying strength observations for cylinders: 6.1 5.8 7.8 7.1 7.2 9.2 6.6 8.3 7.0 8.3 7.8 8.1 7.4 8.5 8.9 9.8 9.7 14.1 12.6 11.2

a. Construct a comparative stem-and-leaf display of the beam and cylinder data.

b. In what ways are the two sides of the display similar? Are there any obvious differences between the beam observations and the cylinder observations?

c. Construct a dotplot of the cylinder data.