For a power generating facility, the maintenance engineer collected the following data regarding the failure of the turbine blade for this facility. . Life for the turbine blade is normally distributed with p=50,000 (hrs) and o=2,000 (hrs). New turbine blade cost is $10,000. . If the turbine blade is replaced before it fails, it will take the maintenance team 5 hours to replace and the facility is therefore shut down. This 5 hours stoppage is estimated to cost the facility $20,000. . If the turbine blade is replaced due to its failure, it will take the maintenance team approximately 16 hours during which time the facility is down due to replacement, checkups and cleaning. The cost associated with this 16 hours shut down is estimated to be $100,000. There are five possible maintenance schedules suggested: 1. Replace the turbine blade at an interval of 42,000 hours: 2. Replace the turbine blade at an interval of 44,000 hours; 3. Replace the turbine blade at an interval of 46,000 hours; 4. Replace the turbine blade at an interval of 48,000 hours; 5. Replace the turbine blade at an interval of 50,000 hours. Select one of these schedules based on the Constant Interval Replacement Policy with the objective of minimizing cost per hour. (Note: you should consider both downtime cost and turbine cost when you calculating the average cost per hour) Based on CIRP policy (minimal cost), interval of 42,000 hours should be selected. Based on CIRP policy (minimal cost), interval of 44,000 hours should be selected. Based on CIRP policy (minimal cost), interval of 46,000 hours should be selected. Based on CIRP policy (minimal cost), interval of 48,000 hours should be selected. Based on CIRP policy (minimal cost), interval of 50,000 hours should be selected