Petiville has 200 unemployed people. Of these 200 people, 35 are unemployed for two weeks before finding a new job, 55 are unemployed for four weeks before finding a new job, 30 are unemployed for six weeks before finding a new job, 15 are unemployed for ten weeks before finding a new job, and 65 are unemployed for fifteen weeks before finding a new job. Approximately what is the average spell of unemployment in Petiville? a. 8 weeks b. 6 weeks C. 4 weeks 2 weeks d