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Answer fast please gsopts) The production of 9m robots consists of six sequential stages. The time it takes to complete each stage is normally distributed

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gsopts) The production of 9m robots consists of six sequential stages. The time it takes to complete each stage is normally distributed with a mean of 140 seconds and a standard deviation of 25 seconds. a) What is the mean and standard deviation of the total time it takes to produce a W robot? What is the probability that this total time is less than 900 seconds? b) Suppose now that the time required to complete each stage has a positive correlation of 0.5 with the stage preceding it. What is the mean and standard deviation of the total production time in this case? What is the probability that the total time is less than 900 seconds in this case? c) Suppose now that the time required to complete each stage has a negative correlation of -0.5 with the stage preceding it. What is the mean and standard deviation of the total production time in this case? What is the probability that the total time is less than 900 seconds in this case? How would you explain the correlation impacts you observed

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