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3. CH4s: A system consists of 3 components, A B and C with reliabilities upon activation of 90%, 95%, and 92% respectively. Component A has a back-up with identical reliability, and a switch with a reliability of 95%. What is the reliability of the entire system? 4. CH4s: Chevy is looking at designing extended warranty packages for their 2021 Silverado Truck. The engine manufacturer confirmed that the engines in the trucks have a mean failure time of 6 years, with a standard deviation of 1.5 years. Within what amount of time should Walmart expect for 97.72% of the trucks to fail? 5. CH2: A manufacturing company needs to calculate productivity for a given period. The table below indicates output and inputs. The rental fee is $300/machine. Employees work 8-hour shift per day and are paid $12/hour. What is labor productivity measured in dollars of input