The Customer Service Center in a large New York department store has determined that the amount of time spent with a custom about a complaint is normally distributed, with a mean of 8.3 minutes and a standard deviation of 2.3 minutes. What is the probability that for a randomly chosen customer with a complaint, the amount of time spent resolving the complaint will be as follows. (Round your answers to four decimal places.) USE SALT (a) less than 10 minutes 0.7700 (b) longer than 5 minutes (c) between 8 and 15 minutes 0.5501