Can anyone help for those Thanks

8. If a corporate bond's flat price is $960 and accrued interest is S40. What's the bond's invoice price A. $960 B. $40 C. $1000. D. $900. 9. A semi-annual coupon payment bond with coupon rate of 10% is selling at par. If the last coupon payment date is 20 days ago and assuming this is a leap year with 366 days of the year. What's the accrued interest? A $4.20 B. C. S5.47 D. $2.54 S10.50 10. At market interest rate level of 2%, a ten-year and a 30-year bond ( both with 8% coupon rates and semiannual payment) are selling at the prices $1,541.37 and S2.348.65, respectively. If you expected that interest rate will jump to 10% from the current level, which bond is risker and what's the percentage change of the bond price due to interest rate jumped? A. Ten-year bond,-10.89% B. 30-year bond,-20.47% C. Ten-year bond,-45.20% D. 30-year bond,-65.48% 11 If current the yield of top-rated corporate bonds is 3% and the yield on intermediated-grade bonds is 2% bigher than that of top-rated corporate bonds. What's confidence index? 0.6 0.8 1.0