Bill needs to schedule a meeting for tomorrow afternoon, but he also has a tee time for goif at 10:00 a.m. Bill usually finishes a round of golf in 6.45 hours. If the course is empty and he doesn't spend too much time looking for lost balls, he can finish in 5.45 hours. However, if the course is crowded, there are rain delays, and/or he hits many bad shots, a round can take as much as 7.70 hours. a. What is the expected time that Bill will require to complete his round of golf tomorrow? (Round your answer to 2 decimal places.) b. If Bill schedules a meeting to begin at 05:30 p.m. tomorrow and it takes 30 minutes for him to get from the goif course to his office, what is the probability that he will make it to the meeting on time? (Do not round intermediate calculations. Round your answer to the nearest whole percent.)