In the pension fund problem, suppose there is an upper limit of 60 on the number of bonds of any particular type that can be purchased. Modify the model to incorporate this extra constraint and then...

In the pension fund problem, suppose there is an upper limit of 60 on the number of bonds of any particular type that can be purchased. Modify the model to incorporate this extra constraint and then reoptimize. How much more money does James need to allocate initially?

How sensitive is the optimal solution (barrels of each output sold and profit) to the required quality points? Answer this by running a two-way SolverTable with these three outputs. You can choose the values of the two inputs to vary.