Finance problems here, help needed thank u!!

9. Donna has decided to set up an account that will pay her granddaughter $20,000 a year indefinitely. How much should Donna deposit today in an account paying 5% annual interest? A. $ 100,000 B. $200,000 C. $400,000 D. none of the above; the correct answer is 10. You need $40,000 to buy a new car. If you have $15,000 now to invest at 10% annual interest rate, how long will you have to wait to buy the new car, if the car price does not increase? A. 10 years B. 18 years C. 26 years D. none of the above; the correct answer is 11. The rate of return earned on an investment of $74,500 today that guarantees an annuity of $12,000 for eight years is approximately A. 6% B. 8 % C. 10% D. none of the above; the correct answer is 2