help please

What is the investor required rate of return for a semi-annual coupon paying bond if the bond has 8 year until maturity, sells for 1,150 and has a coupon of 10% ( 1000 par value)? A. 5.8% B. 3.7% c. 2.9% D. 7.4% What is the current yield of a bond with a 6% coupon, 4 years until maturity, and a price of $840? A. 5.04% B. 7.14% C. 6.00% D. 6.38% At what price would you buy a 2 year 4% annual coupon paying bond, with par value equal to $1000, and a yield to maturity of 4% ? A. $1,000 B. $1040/1.042 C. $1080/1.042 D. $1,000/1.04