4. You observe the yields of the Treasury securities below (all yield are shown on a bond-equivalent basis, twice of the semiannual bond yields): Year Yield to Maturity Spot Rate (%) 0.5 5.25 5.25 1.0 5.50 5.50 1.5 5.75 5.76 2.0 6.00 ? 2.5 6.25 ? 3.0 6.50 ? 3.5 6.75 ? 4.0 7.00 ? 4.5 7.25 ? 5.0 7.50 ? a. Calculate the missing spot rates. b. What is the 6-month forward rate starting in the third year