Suppose a 70 kg man is exposed to 0.1 mg/m3 tetrachloroethylene in the air at his workplace. if he inhales 1 m3 /hr, 8 hours per day, 5 days per week, 50 weeks per year, for 30 years, and if tetrachoroethylene has an absorption factor of 90 percent and an inhalation potency of 2x10-3 (mg/kg/day)-1 , what would be his lifetime cancer risk? what would the risk to be a 50 kg woman similarly exposed?