With reference to the aluminum-alloy strength data in Example 7, make a stem-and-leaf display.

Data From Example 7

EXAMPLE 7 A density histogram has total area I Compressive strength was measured on 58 specimens of a new aluminum alloy un- dergoing development as a material for the next generation of aircraft. 66.4 67.7 68.0 68.0 68.3 69.2 69.3 69.3 69.5 69.5 70.0 70.1 70.2 70.3 70.3 71.0 71.1 71.2 69.6 69.7 69.8 69.8 69.9 70.4 70.5 70.6 70.6 70.8 71.3 71.3 71.5 71.6 71.6 71.7 71.8 68.4 68.6 68.8 68.9 69.0 69.1 70.0 70.9 71.8 71.9 72.1 72.2 72.3 72.4 72.6 72.7 72.9 73.1 73.3 73.5 74.2 74.5 75.3