If you invest $15,000 today at an interest rate of 11% (AER, EAR), how much will you have 20 years from now, assuming no additional deposits or withdrawals in the interim? 2.) If you invest today at an interest rate of 8% per year (AER), how many years does it take to double your money? 3.) What is the Present Value of the following cash flows at an interest rate of 7% AER? (a) $900 received one year from now. (b) $900 received 10 years from now. (c) $900 received each year beginning one year from now and ending in 10 years. (d) $900 received each year beginning one year from now and continuing forever.