$2$ Post$-$Optimality Analysis

This section is independent of the first, and contains a few questions to test your basic knowledge of past$-$optimality $($sensitivity$)$ analysis. Consider a process that makes two products, $x$ and $Y,$ that each requires processing times $($minutes$)$ at four workstations. I ran the model in Excel and the following sensitivity report was generated:

$\backslash$table$[[$Cell$,$Name,$\backslash$table$[[$Final$],[$Value$]],$Redused Cost,$\backslash$table$[[$Objectlve$],[$coefficient$]],$Allowable Increase,$\backslash$table$[[$Allowable$],[$Decrease$]]],[$$B$56$ X$,,9,($A$),55,1$E$430,9\mathrm{.}82],[$$$657$ Y$,,0,($B$),61,($C$),15+30$