The arrival time of an elevator in a 12-story dormitory is equally likely at any time during the next 4.5 minutes. a.Calculate the expected arrival time. (Round your answer to 2 decimal places.) b.What is the probability that an elevator arrives in less than 1.1 minutes? (Round intermediate calculations to at least 4 decimal places and final answer to 3 decimal places.) c. What is the probability that the wait for an elevator is more than 1.1 minutes? (Round intermediate calculations to at least 4 decimal places and final answer to 3 decimal places.)