Terri Vogel, an amateur motorcycle racer, averages 129.76 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.27 seconds. The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 129.76 2.27 b. Find the proportion of her laps that are completed between 127.43 and 128.8 seconds. c. The fastest 4% of laps are under d. The middle 60% of her laps are from seconds. seconds to seconds.