Consider the following bonds each of which is redeemable at par, pays semi-annual coupons, and has an yield rate of 7.6% compounded semi-annually. Bond Coupon Rate, c(2) (as a percent) 6.00 7.00 4.00 Face Value in dollars) 2000 3500 3000 Maturity Purchase Price (in years) | (in dollars) 6 1848.08 8 3375.83 2897.86 Duration (in years) 5.084 6.222 00 0.990 Suppose that a portfolio of bonds contains 7 units of Bond A, 4 units of Bond B, and 10 units of Bond C. (a) Determine the present value of the portfolio of bonds. Present Value of Portfolio = $ (b) Determine the duration (to 3 decimals) of the portfolio of bonds. Duration of Portfolio = years Note: Use all dollar values to the closest cent in your duration calculation. (c) Use the duration to estimate the absolute and percentage (or relative) change in the portfolio value if the yield increases by 0.4 %. Estimated Absolute Change in Portfolio = $