Answer Correctly Without Copying

20. A manufacturer of small gasoline engines conducts reliability testing of its engines by running sample a engines (on a test stand) for a continuous duration of 32 hours. For a new engine model, 24 engines are tested using this approach. Of these, one failed at 1.8 hours, one failed at 18.4 hours, and one failed at 26.3 hours. The remaining engines successfully completed the test. (a) Compute the estimated mean life in hours. [5 points] (b) If the average time to repair one of these engines following an operational failure is 24 hours, compute the estimated availability. [5 points]