In a 10k run, 27.4% of the runners finished the race in 49 minutes, 42 seconds or faster. suppose that this result holds true for all people who would participate in and finish a 10k race. Suppose that two 10k runners are selected at random. Let x be the number of runners in these two who would finish a 10k race in 49:42 or less. Draw a complete tree diagram and use it to write the probability distribution of x.