A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. Class Interval 20 to < 258 25 to 306 30 to < 355 35 to 40 12 40 to < 45 15 45 to < 507 Frequency What is the midpoint of the third class interval? 22.5 27.5 32.5 37.5 42.5