This week, a very large running race (5K) occured in Denver. The times were normally distributed, with a mean of 19.4 minutes and a standard deviation of 4.34 minutes. a. What percent of runners took 29.551 minutes or less to complete the race? b. What time in minutes is the cutoff for the fastest 99.87 %? c. What percent of runners took more than 22.214 minutes to complete the race?