Use the following data for the next four questions: Table 5: Serum BUN values (mg/dL) from hospital employees at Kettering Medical Center 15.9 22.5 9.1 16.8 6.4 28.6 15.2 23.7 10.3 17.0 13.8 20.5 7.4 25.0 4.1 18.4 12.7 13.6 30.9 21.3 What are best classes to use for this data? Please select the single best answer 0-5, 5-10, 10-15, 15-20, 20-25, 25-30, 30-35 0-10, 10-20, 20-30, 30-40 0-3, 3-6, 6-9, 9-12, 12-15, 15-18, 18-21, 21-24, 24-27, 27-30, 30-33 4-9, 9-14, 14-19, 19-24, 24-29, 29-34