(Related to Checkpoint 5.6 ) (Solving for ) You are considering investing in a secueity that will pay you $1,000 in 28 years. a. It the approprate dacount rate is 10 percent, what is the present volue of this imvesterent? b. Assume thewe imvestrents sell for $310 in rotum for which you receme $1,000 in 28 years: What is the rate of retum irvestors earn on Bis investment if they buy it for $310 ? a. If the aporopriate discount rale is 10 percent, the present value of this investment is : (Bround to the nearest cent]