3 parts. Box weighs 9 oz, Has normal distribution with mean of 9.12 and standard deviation of .15 oz: Part A: What % of boxes weigh between 8.895 and 9.95? Part B: What is narrowest range in which we find 68.27% of weights of all boxes? Part C: Find 80th percentile or the weight that 80% of all boxes weigh less than.