A.)How much do you need to invest semiannually into an ordinary annuity earning an annual interest rate of 7.12% compounded semiannually so that you will have $5,953.19 after 7 years? B.) If you make quarterly deposits of $309.00 into an ordinary annuity earning an annual interest rate of 5.74%, how much will be in the account after 15 years? How much interest did you earn in those 15 years?