alions. The reliability of a turbine blade is given by R0=(1-4) (t) 1 Oststo , where to is the maximum life of the blade. (a) Show that the blades are experiencing wear out. (b) Compute MITF as a function of the maximum life. (c) If the maximum life is 2000 operating hours, what is the design life for a reliability of 0.90? If a device has a failure rate of 2(t) =(0.015+0.02 t) per a year, where t is in years, (a) calculate the reliability for a 5 year design life, assuming that no maintenance is performed. (b) calculate the reliability for a 5 year design life, assuming that annual preventive maintenance restores the device to an as good as new condition. (c) calculate the reliability for a 5 year design life, assuming that there is a 5% chance that the a preventive maintenance will cause immediate failure.