a) Briefly explain Reliability. A system is composed of a single module with a poor reliability value of only 0.75. To improve the system's reliability through redundancy, an identical module is added in parallel. What will the system's reliability be? What if another level of redundancy is added? (10 MARKS) (CLO3:PLO3:C3) b) A manufacturer of disk drives for notebook computers wants an MTBF of at least 50,000 hours. Recent test results for 10 units were one failure at 10,000 hours, another at 25.000 hours, and two more at 45,000 hours. The remaining units were still running at 60,000 hours. Determine the following: i. Percent of failures ii. Number of failures per unit-hour (10 MARKS) (CLO4:PLO3:C4) ii. MTBF at this point in the testing a) Briefly explain Reliability. A system is composed of a single module with a poor reliability value of only 0.75. To improve the system's reliability through redundancy, an identical module is added in parallel. What will the system's reliability be? What if another level of redundancy is added? (10 MARKS) (CLO3:PLO3:C3) b) A manufacturer of disk drives for notebook computers wants an MTBF of at least 50,000 hours. Recent test results for 10 units were one failure at 10,000 hours, another at 25.000 hours, and two more at 45,000 hours. The remaining units were still running at 60,000 hours. Determine the following: i. Percent of failures ii. Number of failures per unit-hour (10 MARKS) (CLO4:PLO3:C4) ii. MTBF at this point in the testing