The average weight of a particular box of crackers is 33.0 ounces with a standard deviation of 13 ounce. The weights of the boxes are normally distributed a. What percent of the boxes weigh more than 317 ounces? (Round your answer to the nearest hundredth percent.) b. What percent of the boxes weigh less than 291 ou toes? (Round your answer to the nearest hundredth percent.) Percent of boxos b Percent of boxes %