Determine whether the data are qualitative or quantitative, and determine the level of measurement of the data set. Explain your reasoning.

(a) The numbers of employees at fast-food restaurants in a city are listed.

(b) The grade point averages (GPAs) for a class of students are listed.

11 6 18 23 31 17 32 14 37 12 25 40 18 20 13 22 25 27 18 3.6 2.2 3.2 2.0 2.5 3.8 1.9 2.8 3.5 3.0 3.2 1.7 3.6 2.5 3.7 4.0