Is my answer to the first box correct? What are the answers to the remaining three boxes? Please be clear with the answer to each box. Thank you very much!

.8521 Consider a system with 4 independent stages, each of which must function correctly in succession for the system to operate properly. In other words, stage 1 must function correctly, then stage 2 must function correctly, then stage 3 must function correctly, and then stage 4 must function correctly. If any of the stages fail to function correctly, the system fails. The reliability at initiation (when we attempt to use it) for stage 1 is.9773, stage 2 is .8899, stage 3 is .9913, and stage 4 is .9884. The system reliability at initiation is 1. Round your answer to 4 decimal places and do not include a leading zero. You have been given a budget to increase the system reliability as high as possible. You have only two options: 1) you may replace one of the stage's machine with a machine that has a reliability of .9995, or 2) you may add two backup machines to add redundancy to whichever stages you wish - one of the backup machines has a reliability of .8500 and the other has a reliability of.8000. If you choose option 1, the maximum system efficiency you can achieve is Round your answer to 4 decimal places and do not include a leading zero. If you choose option 2, the maximum system efficiency you can achieve is Round your answer to 4 decimal places and do not include a leading zero. Your newly optimized system produces an electronic component that fails in an average of 96 months after it is manufactured. The probability that a component will fail in less than 3 years is 1. Round your answer to 4 decimal places and do not include a leading zero