Reconsider the Wyndor Glass Co. case study introduced in Section 2.1. Suppose that Bill Tasto (Wyndor's vice president for manufacturing) now has found a way to provide a little additional production time in Plant 2 to the new products.

a. Use the graphical method to find the new optimal solution and the resulting total profit if one additional hour per week is provided.

b. Repeat part a if two additional hours per week are provided instead.

c. Repeat part a if three additional hours per week are provided instead.

d. Use these results to determine how much each additional hour per week would be worth in terms of increasing the total profit from the two new products?