please help me solve 7 to 10 with calculations

What is the rate of return for an investor who pays $1,054.47 for a three-year bond with a 7% coupon and sells the bond one year later for $1,037.19 ? Answer in percentage terms to 2 decimals and without the % sign. Question 8 What is the current yield of a bond with a 6% coupon, four years until maturity; and a price of $884.26? in % terms to 2 decimal places without the % sign. Question 9 A corporate bond with a 6% coupon (paid semiannually) has a yield to maturity of 7.5%. The bond matures in 20 years but is callable at $1050 in ten years. The maturity value is par. Calculate the bond's yield to call. \% terms w/o $ sign. (HiNT: Find the current price and then solve for VTC) Question 10 Cornerstone industries has a bond outstanding that has a 5% coupon rate, $1,000 face value, and a market price of $897,34. If the bond matures in 5 years and interest is paid on a semi-annual basis, what is the yieid to maturity on the bond? % format to 2 decimal places - no % sign