I tried this question and got the wrongs answers. can you figure this out within the next 15-30 mins please

a Compute the company's averake pretax borrowing cost, (Hint: USe the average amount of debt as the dentiminator in the computation) Round your answer to one decimal place (e0;0.0345=3.5N) i b. Assume that the bock value of its cebt equats its muket valurn, Then, eitimate the company's cos of debt captal. Heund your answer to one decimat plate (ex: 0.03al = 1.56 )