Question 5: Suppose the trafc light at a specic intersection changes to green at 4-minute intervals. If a ear arrives at the trafc light at a random time, thenX = waiting time in minutes, is uniformlyr distributed between D and 4. a} Find the probability that a driver waits less than 1.5 minutes. b} Suppose a random sample of 35 ears are observed and their waiting time is recorded. 1'What is the probability that the sample mean of the waiting times is less than 1.5 minutes