Question 8 THes remaining: 'I Marked out of 2.00 i7 Fiag queson Question 7 Tries remaining; 1 Marked out of 3.00 '7 Flag question Answer the following two questions regarding delay time for flights. (a) Suppose the delay time (in minutes) of all flights from Edmonton to Winnipeg is uniformly distributed between 0 and 36 minutes. Given your flight from Edmonton to Winnipeg is more than 12 minutes late, what is the probability of your flight being more than an additional 18 minutes late? (Enter your answer as a fraction.) [:1 (b) Refer to the question in part (a). Calculate the probability above such that delay time now follows an exponential distribution with a mean of 18 minutes. (Round your answers to 3 decimal places, if needed.) C] Check Engineers observe that about 85% of graphite samples fracture within 7 hours when subjected to a certain stress. (Round your answers to 3 decimal places, if needed.) (a) If the time to fracture is modeled with an exponential distribution, what would be a suitable value for the parameter A? [:1 (b) Use the model to estimate the probability that a fracture occurs within 3 hours. B (c) Use the model to estimate the probability that a fracture occurs after 2 hours. C] Check