SparkPlug currently uses 8% as its after-tax cost of capital. Tom Morgan, production manager, is very much in favor of the investment. He argues that the total after-tax net cash infiows is more than the cost of the investment, even if the demand for the product is somewhat uncertain. "The project will pay for itself even if the demand is only half the projected level," Cindy Morgan (corporate controller) believes that the cost of capital should be 11% because of the declining demand for SparkPlug products Required: 1. What is the estimated NPV of the project if the after-tax cost of capital (discount rate) is 8% ? Use the built-in NPV function in Excel. (Negative amounts should be indicated by a minus sign. Round your answer to the nearest whole dollar amount.) 2. What is the estimated NPV of the project if the after-tax cost of capital (discount rate) is 11\%? Use the built-in NPV function in Excel. (Negative amounts should be indicated by a minus sign. Round your answer to the nearest whole dollar amount.) 3. Use the bulit-in function in Excel to estimate the project's IRR. (Round your answer to 1 decimal places.) 4. Do a sensitivity analysis by using GOAL SEEK to determine, given estimated cash inflows, the original investment outiay that would result in an IRR of 11\% (Round your answer to nearest whole dollar amount.)