Hi experts, I am struggled with how to solve the financial accounting for the below questions, please help me

Upon the successful completion of its first project ABC Investment (TDI) decides to launch the second phase of the project, which is financed by the companys USD-denominated bond under the following terms: Seven years to maturity, coupon rate 10% paid semi-annually, par value 1,000, and yield to maturity 20%

a/ At what price is the bond selling for now?

b/ Two years passes by for bonds of the same credit rating (risk), the market requires 10%. At what price should the bond be selling at this time?

c/ What is the bondholders rate of return over the first year of holding the bond? If inflation is 5%, what is the real rate of return over the year?