In the Hermosa Beach triathlon, the finishing times for the men ages 30-34 group has a mean of 4,313 seconds with standard deviation 583 seconds. (a) Suppose the distribution of finishing times is approximately normal. One reason to use a normal distribution is to make estimates about data. The model gives statisticians confidence that the mean is equal to the median and that the empirical rule (68-95-99.7 rule) holds true. Draw a normal curve and label each interval and the percentage of data each comprises according to the empirical rule.