The hours worked during a weekday for Americans are normally distributed with a mean of 6.91 hours and a standard deviation of 1.23 hours. Round the first three of your answers to four decimals. Compute the probabilities that an American will work more than 9 hours Compute the probabilities that an American will last less than 6 hours Compute the probabilities that an American will last between 5 and 8 hours. What is the minimum hours that an American has to work in order to be in the top 10%. Round your answer two decimal places.