Please help me solve this question and explain

Bonner Metals wants to issue new 20-year bonds. The company currently has 8.5 percent bonds on the market that sell for $994, make semiannual payments, and mature in 7 years. What should the coupon rate be on the new bonds if the firm wants to sell them at par? ( 10 points) 8.62 percent 8.75 percent 9.23 percent 8.87 percent Question 6 (Mandatory) (4 points) Explain why we were unable to use the constant growth model in class to value shares in Apple: (4 points) The expected rate of return on the stock was greater than 5%. The constant growth rate in dividends was less than 5% The expected rate of return on the stock was less than the constant dividend growth rate. The expected rate of return on the stock was equal to the constant dividend growth rate