A six station assembly machine has an ideal cycle time $=9$ seconds. The cost of individual components is low, and the fraction defect rate at each of the six stations is $q=0\mathrm{.}02.$ When a breakdown occurs it takes an average of $2$ minutes for the system to be put back into operation. A decision must be made whether the system should be operated under memory control or instantaneous control. For both of these strategies, determine: the production rate of good assemblies, the yield of good product $($proportion of final assemblies containing no defective components$),$ and the proportion of uptime of the assembly system. Which control would you recommend and why?