simple discount note

Shameka Bonner has a simple discount note for $11,000, at an ordinary bank discount rate of 11%, for 120 days. What is the effective interest rate? Round to the nearest tenth of a percent.
2. A loan of $8,900 at 7.75% annually is made on September 10 and due on December 10. Find (a) the exact interest and (b) the ordinary interest. Round answers to the nearest cent.