Q1: I sign a contract that guarantees me an immediate payment of $2 000, but then I have to invest $800 a year for ten years. At the end of the tenth year, I get a further payment of $8000. If I can invest money at 10% interest, what is my approximate external rate of return on the contract?

Q2: A project involves an immediate expenditure of $1000, and will require additional expenditures of $100 a year for the next ten years, starting one year from now. After ten years it yields an income of $3 000. What is its rate of return?

Kindly, answer both questions. Thank you.