You examine a pension obligation for your company and would like to immunize it from interest rate movements. This obligation has a duration of 11.34 years, and if you only used two types of bonds, how much would you allocate to PERPETUITIES if your only other bonds available were 6 year, zero coupon bonds? Interest rates currently yield 0.08 0.6824 0.5947 0.7120 0.6545 0.6214