an 80-kg man has been working 4 days a week for 30 years at 10 hours per day. assume he works 50 weeks a year. he has been inhaling (all these years) at this workplace an average of 1.0 m3/hr. of air contaminated with 0.15 mg/m3 of trichloroethylene. if the absorption factor for the chemical is 0.80 (e.g., 80% of the chemical exposure enters his body), what is the probability (risk) that this man will have cancer in his lifetime?