please answer all!):

(Related to Checkpoint 5.6) (Solving for i ) 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 $4,424 to invest. What annual rate of return must Kirk earn on his investment to accumulate enough money to pay for the ring? The annual rate of return Kirk must earn on his investment to accumulate enough money to pay for the ring is %. (Round to two decimal places.) (Related to Checkpoint 5.6) (Solving for i ) You are considering investing in a security that will pay you $1,000 in 29 years. a. If the appropriate discount rate is 8 percent, what is the present value of this investment? b. Assume these investments sell for $467 in return for which you receive $1,000 in 29 years. What is the rate of return investors earn on this investment if they buy it for $467? a. If the appropriate discount rate is 8 percent, the present value of this investment is \$ . (Round to the nearest cent.)