Roller coaster ride: A roller coaster is being designed that will accommodate 60 riders. The maximum weight the coaster can hold safely is 12,000 pounds. According to the National Health Statistics Reports, the weights of adult U.S. men have mean 199 pounds and standard deviation 73 pounds, and the weights of adult U.S. women have mean 169 pounds and standard deviation 82 pounds. Use the TI-84 Plus calculator. Answer the three following questions.

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