The numbers provided are in thousands of dollars. All securities are selling at par. $ 90 Time deposits $1,100 Treasury bill Treasury notes Treasury bonds $ 55 Fed funds sold $ 230 $ 176 $2,500 Loans Demand deposits Equity $4,679 $1,170 Notes: All Treasury bills have six months until maturity. One-year Treasury notes are priced at par and have a coupon of 7 percent paid semiannually. Treasury bonds have an average duration of 4.5 years and the loan portfolio has a duration of 7 years. Time deposits have a 1-year duration and the Fed funds duration is .003 years, Question: What would the duration of the assets need to be to immunize the equity from changes in market interest rates