$9.$ Michael Paschall knows that any capital budgeting proposal will be carefully examined at divisional headquarters in Kansas City. In order to give him a better idea about what estimates are most important to the project, Paschall will investigate how the following changes impact the NPV and IRR An increase $($from the base$-$case estimate of $\mathrm{.}16)$ in the discount rate to $\mathrm{.}18$ and a decrease to $14$; other variables at their base$-$case values. $2.$ An increase $($from the base$-$case estimate of $8\mathrm{.}82)$ in hourly production to $9\mathrm{.}44$ tons per hour, and a decrease to $8\mathrm{.}2($return the discount rate to the base$-$case estimate of $\mathrm{.}16).3.$ An increase in annual sales growth to $\mathrm{.}07,$ and a decrease to $\mathrm{.}05$; other vari$-$ ables at their base$-$case values. $4.$ An increase in the growth of annual operating costs to $\mathrm{.}07,$ and a decrease to $\mathrm{.}05$; other variables at their base$-$case values $5.$ An increase in the growth of annual material costs to $\mathrm{.}07,$ and a decrease to ; again keeping other estimates at their base$-$case values. $6.($a$)$ Annual growth of $\mathrm{.}05$ in sales, material, and operating costs $($ b$)$ Annual growth of $\mathrm{.}04$ in sales, material, and operating costs. $()$ Annual growth of $\mathrm{.}03$ in sales, material, and operating costs. $()$ No annual growth in sales, material, or operating costs $($Paschall calls this the $"$no$-$growth scenario"$).$ NOTE: For each part of question $6,$ keep the discount rate and the hourly pro$-$ duction rate at their base$-$case estimates of $\mathrm{.}16$ and $8\mathrm{.}82,$ respectively Based on the results of the above changes, what estimates are most crucial to the project? Looked at from a different angle, where do you recommend Paschall concentrate his forecasting efforts? Defend your answer