How does the following changes impact NPV and IRR.

- Increase (from the base case estimate of .16) in the discount rate to .18, and a decrease to .14, other variables at their base case values.

- Increase (from base-case estimate of 8.82) in hourly production to 9.44 tons per hour, and a decrease to 8.2 (return the discount rate to the base case estimate .16)

- Increase in annual sales growth to .07 and decrease to 0.05, other variables at their base case values.