An insurance company must make a payment of $18,410 in eight years. The market interest rate is 5%, so the present value of the obligation is $10,000. The companys portfolio manager wishes to fund the obligation using two-year zero-coupon bonds and perpetuities paying annual coupons (We focus on zeros and perpetuities to keep the algebra simple.). If the fraction of the asset portfolio invested in the zero-coupon bonds is called w and with it to immunize the obligation, whats the value of w? A. 0.2782 B. 0.3981 C. 0.6842 D. 0.993