Reconsider the model in Prob. $4\mathrm{.}1-5.$ Follow the instructions

of Prob. $4\mathrm{.}2-1$ for parts $($a$),($b$),$ and $($c$).$

$($d$)$ Repeat part $($b$)$ for the corner$-$point infeasible solutions and the

corresponding basic infeasible solutions.

$($e$)$ Repeat part $($c$)$ for the basic infeasible solutions