QZ. Arizona State University provides bus service to students while they are on campus. A bus arrives at the Station 1 and Station 2 every 30 minutes between 6 am. and 11 pm. during weekdays. Students arrive at the bus stop at random times. The time that a student waits is uniformly distributed from D to 8 minutes. I. Sketch a graph of this distribution. (3 marks} ll. What is the mean waiting time? (I mark) Ill. What is the probability that a student will wait more than 3.5 minutes? (I merit} hr. What is the probability that a student will wait between 2.5 and 5 minutes? (I merit} 1:. What is the probability that a student will wait more than 5.5 minutes? (I mark}