Chapter 4, Problem 13RE

To determine

To calculate: The solution to the problem and also the solution to its dual of the tableau:

$\begin{array}{c}y\\ x\\ w\\ M\end{array}\left[\begin{array}{ccccccc}0& 1& 1& -1& 0& 0& 5\\ 1& 0& -1& 2& 0& 0& 4\\ 0& 0& 1& -4& 1& 0& 2\\ 0& 0& 1& 1& 0& 1& 23\end{array}\right]$