a. What would you pay for an ordinary annuity of $2,000 paid every six months for 12 years if you could invest your money elsewhere at a nominal interest rate of 10% compounded semiannually? b. Thirty years ago, Ali bought 10 acres of land for $1,000 per acre If this land grew in value at an annual interest rate of 8 percent, what is it worth today? c. What annual interest rate is implied if you lend someone JD1850 and are repaid JD2078.66 in two years