Question: The manufacturing process for widgets involves three steps. Assume that the time spent in each of these three steps is an exponential random variable with

The manufacturing process for widgets involves three steps. Assume that the time spent in each of these three steps is an exponential random variable with parameter values equal to 2, 4, and 5 repsectively. 1. Indicate the distribution of the manufacturing time and find its pdf. 2. Find the expected duration, variance, and, squared coefficient of variation of the manufacturing process.

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