ab: Part 1 of 4 In a study of facial behavior, people in a control group are timed for eye contact in a 5-minute period. Their times are normally distributed with a mean of 176.0 seconds and a standard deviation of 55.0 seconds. Use the 68-95-99.7 rule to find the indicated quantity. a. Find the percentage of times within 55.0 seconds of the mean of 176.0 seconds. % (Round to one decimal place as needed.)