Kirk Van$$ Houten, who has been married for $24$

$$years$,$ would like to buy his wife an expensive diamond ring with a platinum setting on their$30-$year wedding anniversary. Assume that the cost of the ring will be $$$$13$ comma $000$

in $6$

years. Kirk currently has $$$$4$ comma $587$

to invest. What annual rate of return must Kirk earn on his investment to accumulate enough money to pay for the$$ ring?