Kirk Van​ Houten, who has been married for 22 ​years, would like to buy his wife an expensive diamond ring with a platinum setting on their​ 30-year wedding anniversary. Assume that the cost of the ring will be ​$12,000 in 8 years. Kirk currently has ​$4,554 to invest. What annual rate of return must Kirk earn on his investment to accumulate enough money to pay for the​ ring