Identify the population from which each of the following samples were drawn:

(a) the times of the last five Kentucky Derby winners;

(b) the fuel efficiencies (miles/gal) of 100 Toyota Camrys;

(c) the grade point averages of 55 graduating seniors;

(d) the drag coefficients computed from five wind tunnel tests on a model of a new car; and

(e) the porosity of eight soil samples made from a 1-acre field.