please solve question 9 to 14

Part II: Discounting and NPV A city project has net benefits that occur in the following years: 9. What would be your decision rule using net present value and any positive discount rate. Why? 10. What is the definition of IRR 11. Without calculating it, what is IRR in the above scenario? The city waited until construction costs came down and got new bids. The project now has net benefits that occur in the following years: 12. What is NPV using a 7% discount rate? What is the decision rule? 13. What is NPV using a 5% discount rate? What is the decision rule? 14. What is the IRR