#11 and 13 HELP

CHAPTER 21. 10. (Solving for PV of Ordinary annuity) You are expected to receive $20,000 at the end of the next 30 years. If the opportunity cost of capital interest rate) is 12% per year, com annually, what is its present value? (Solving for PV of Ordinary annuity) You are expected to receive $30,000 at the end of each the next 20 years. If the opportunity cost of capital (interest rate) is 13% per year, compound annually, what is its present value? (Solving for FV of Ordinary annuity) You are expected to receive $10,000 at the end of eacha! the next 20 years. If the opportunity cost of capital interest rate) is 10% per year, compounded annually, what is its future value? (Solving for FV of Ordinary annuity) You are expected to receive $50,000 at the end of each of the next 10 years. If the opportunity cost of capital interest rate) is 10% per year, compounded annually, what is its future value