a protfolio manager wishes to immuize the portfolio from interest rate risk. The assets are $12,000,000, with a duration of 10 years; there is a $4,000,0000 in equity. you have two liability choices of: 1. a zero coupon yielding 7 percent and a maturity of 14 years and 2. a 99 year bond yielding 6.67 percent. How much would you recommend each type of liability?