2.9 (Annuity interest rate) Your parents have just phoned to ask you for some advice. An insurance agent has contacted them and offered them the opportunity to purchase an annuity for $21074.25 that will pay them $3000 per year for 20 years. Your parents do not have the slightest idea what return they would be making on their investment of $21074.25. What rate of return would they be earning? 2.10 (Present value of an annuity due) Determine the present value of an annuity due of $1000 per year for 10 years discounted to the present at an annual interest rate of 10%. What would be the present value of this annuity due if it were discounted at an annual rate of 15%