how did they got the answers

Question 9 071 point A company just issued a ten-year, $10,000 bond with a coupon rate of j2-8.58%. What price would an investor be willing to pay for the bond if they wanted a return on their investment of i2=10%? Answer: * (9,115.18) Question 10 0/1 point The owners of a condominium building wish to save enough money to replace the roof on their building in 10 years. The new roof is projected to cost $58,500. How much must they deposit monthly into an account earning 112-3% in order to have enough money for the new roof? Answer: X (418.63) Attempt Score: 2/10 - F Overall Grade (highest attempt): 2/10 - F