Compute the long$-$term average throughput, cycle time and x$-$factors for this

factory for fixed work$-$in$-$process levels of $5$ and $10$ for the four machine serial

flow factory model below where the constant processing times are listed on the

machines. Argue that the results of the WIP level of $10$ are the measures reported

for the example factory with the new Machine $2$ with a processing time of $1\mathrm{.}5$ hours.