IM Systems assembles microcomputers from generic components. It purchases its color monitors from a manufacturer in Taiwan; thus, there is a long lead time of $25$ days. Daily demand is normally distributed with a mean of $3\mathrm{.}5$ monitors and a standard deviation of $1\mathrm{.}2$ monitors. What is the reorder point corresponding to a $90\%$ service level? $[1\mathrm{.}5]$ IM systems is considering purchasing monitors from a US manufacturer that would guarantee a lead time of eight days, instead of from the Taiwanese company. Determine a new reorder point given this lead time and identify the factors that would enter into the decision to change manufacturers.