Justin purchases a retirement annuity that will pay him $3,000 at the end of every six months for the first twelve years and $600 at the end of every month for the next six years. The annuity earns interest at a rate of 4.5% compounded quarterly. a. What was the purchase price of the annuity? Dound to the nearest cent b. How much interest did Justin receive from the annuity? Round to the nearest cent