The owner of a bakery knows that the number of rolls sold each day follows a normal distribution with a mean of 190 rolls and a standard deviation of 22 rolls. a) In order to break even, the shop owner must sell more than 154 rolls. On any given day, what is the probability that the owner will break even? b) How many rolls should the owner bake if the probability of being out of stock on any given day does not exceed 10%? c) To save money, the shop owner bought enough ingredients to make 3100 rolls in the next 17 days. What is the probability that he sells all the rolls? Tip: Determine the average number of rolls he has to sell per day.