I really really need help on these three. My teacher does not go over things like this for me to have enough knowledge in regards to these topics.

10. If interest rates go up after you purchase a corporate bond: a. The market value of the bond is unaffected. b. The market value of the bond increases. c. The coupon payments increase. d. The market value of the bond decreases. 11. Wilson Enterprises' bonds currently sell for $1,050. They have a 6-year maturity, an annual coupon of $80, and a par value of $1,000. What is their current yield? a. 7.14% b. 7.50% c. 7.62% d. 6.47% e. 8.68% 12. The yield curve is usually upward sloping because of the: a. Inflation premium. b. Liquidity premium. c. Maturity risk premium. d. Default risk premium