The manager of a health food store has determined that the weekly demand, X, for a popular type of granola is a normally distributed random variable with mean 85 pounds and standard deviation 5 pounds. the manager notices that over the last month, the weekly demands have been slightly higher than usual. She decides that if the total demand over the next 2 weeks, x1+x2 is grater that 180 pounds, the stock on hand for each weak will increase. Assuming that weekly demand has given distribution, and that the demand in any week is independent of the demand in any other week, what is probability that the total demand over the next 2 weeks will exceed 180 pounds.