Suppose the following are the ages of a group of individuals enrolled in a study looking at the relationship between sleep apnea and Alzheimer's disease.

67, 87, 92, 86, 83, 85, 72, 65, 68, 73, 98, 78, 61, 90, 85, 84, 83, 72

A)Create a stem-and-leaf plot for the distribution of ages in this study.

B)Interpret the stem-and-leaf plot with respect to the spread of the distribution.