Create a stochastic model in Excel for an assembly operation. The assembly operation has been timed and takes an average of 3.3 minutes. The time variation is normally distributed with a standard deviation of 0.23 minutes. Create and plot a histogram with CDF. With the current operation, what fraction of the assemblies are completed in less than 4.0 minutes? Consider at least 200 but not more than 1000 production cycles.