A statistical analysis of 1,000 long-distance telephone calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed, with = 240 seconds and = 40 seconds. a. What is the probability that a call lasted less than 180 seconds? b. What is the probability that a call lasted between 180 and 300 seconds? c. What is the probability that a call lasted between 110 and 180 seconds