6. Post-optimal Analysis for Cases Affecting Both Optimality and Feasibility. Suppose
that you are given the following simultaneous changes in the Reddy Mikks model:
The revenue per ton of exterior and interior paints are $1000 and $4000, respectively,
and the maximum daily availabilities of raw materials, M1 and M2, are 28 and 8 lons,
respectively.
(a) Show that the proposed changes will render the current optimal solution both
nonoptimal and infeasible.
(b) Use the generalized simplex algorithm (Section 4.4.2) to determine the new optimal
feasible solution.