$5.$ A $10-$year bond pays $5\%$ annually on a face value of $$1,000.$ If similar bonds are currently yielding $5\%,$ what is the market value of the bond? Use semi$-$annual analysis.

$6.$ A $20-$year bond, with a par value equalling $$1,000,$ pays $8\%$ annually. If similar bonds are currently yielding $10\%$ annually, what is the market value of the bond? Use semi$-$annual analysis.

$7.$ A $10-$year zero$-$coupon bond that yields $11\%$ is issued with a $$1,000$ par value. What is the issuance price of the bond?