Please answer each question and show work.

Use the following infomration to answer the next three exercises. The Sky Train from the telminai to the rentalcar and longterm parking center is supposed to arrive eveiy eight minutes. The waiting times for the train are known to follow a uniform distribution. ?9. What is the average waiting time (in minutes)? a. zero b. two c. three d. four 80. Find the 30'"1 percentile for the waiting times (in minutes). a. two b. 2.4 c. 2.?5 d. three 81. The probability of waiting more than seven minutes given a person has waited more than four minutes is? a. 0.125 b. 0.25 C. 0.5 d. 0.?5