2. (Textbook 2.18, 2.20, pp 117-118) In triathlons, it is common for racers to be placed into age and gender groups. Friends Leo and Mary both completed the Hermosa Beach Triathlon, where Leo competed in the Men, Ages 30 - 34 group while Mary competed in the Women, Ages 25 - 29 group. Leo completed the race in 1:22:28 (4948 seconds), while Mary completed the race in 1:31:53 (5513 seconds). Obviously Leo finished faster, but they are curious about how they did within their respective groups. Can you help them? Here is some information on the performance of their groups: . The finishing times of the Men, Ages 30 - 34 group has a mean of 4313 seconds with a standard deviation of 583 seconds. . The finishing times of the Women, Ages 25 - 29 group has a mean of 5261 seconds with a standard deviation of 807 seconds. . The distributions of finishing times for both groups are approximately Normal. Remember: a better performance corresponds to a faster finish. Let X denote the finishing times of Men, Ages 30 - 34, and Y denote the finishing times of Women, Ages 25 - 29. (a) Write down the short-hand for these two normal distributions. (b) Use the 68-95-99.7 Rule to approximate the probability that the finishing time for someone from the Men, Ages 30 - 34 group falls between 3147 and 4896. (c) (Use Standard Normal Distribution Table) What percent of the triathletes did Leo finish faster than in his group? What percent of the triathletes did Mary finish faster than in her group? (d) (Use Standard Normal Distribution Table) Find the cutoff time for the fastest 5% of athletes in the men's group, i.e. those who took the shortest 5% of time to finish