6. A cancer study was conducted with female mice to determine the carcinogenic effects of food contaminated with 2-acetylaminofluorene. The animals were sacrificed and examined after two years. The raw data are shown below: Dose in feed (mg/kg-day) Number of animals Number with lever neoplasm 0 762 20 30 2109 164 35 1361 128 45 888 98 60 758 118 75 587 118 100 297 76 150 314 126 Determine the CSF using linear model. 7. Using the slope factor determined in Problem 6, determine the concentration of 2-acetylaminofluorene that will give a risk of one tumor in 106 exposed female mice