A survey indicates that for each trip to the supermarket, a shopper spends an average of mu=45 minutes with a standard deviation of sigma=12 minutes. The length of time spent in the store is normally distributed and is represented by the variable x. A shopper enters the store. Find the probability that the shopper will be in the store more than 39 minutes. Write your answer to four decimal places. Do not include the zero in the ones place. (ie. .1111)