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a$.$ Suppose a U$.$S$.$ Treasury bill, maturing in one year, can be purchased today for $$91,500.$ Assuming that the security is held until maturity, the investor will receive $$100,000($face amount$).$ Determine the rate of return on this investment. Round your answer to two decimal places. $\%$

b$.$ Suppose a National Telephone and Telegraph $($NTT$)$ Company bond, maturing in one year, can be purchased today for $$920.$ Assuming that the bond is held until maturity, the investor will receive $$1,000($principal$)$ plus $9$ percent interest $($that is$,0\mathrm{.}09$$$1,000-$$$90).$ Determine the rate of return on this investment. Round your answer to two decimal places.

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c$.$ Determine the implied risk premium on NTT bonds. Round your answer to two decimal places.

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