You manage a pension fund that will provide retired workers with lifetime annuities. You determine that the payouts of the funds are going to closely resemble perpetuities of $1 million per year. The interest rate is 9% per year. You plan to fully fund the obligation using 5-year and 20-year maturity zero-coupon bonds. How much market value of each of the zero coupon bonds will be necessary to fund the plan if you desire an immunized position? Duration of a perpetuity is (1+y)/y