=b. Use the Graphical Linear Programming and Sensitivity Analysis module in your Interactive Management Science Modules to solve the model. Then use this module to check if the optimal solution would change if the unit profit for grandfather clocks were changed from $300 to $375 (with no other changes in the model). Then check if the optimal solution would change if, in addition to this change in the unit profit for grandfather clocks, the estimated unit profit for wall clocks also changed from $200 to $175.