A "good-deal broker" offers you the follow- ing "good-deal." If you give him $200 at the end of each year for the next 20 years he will give you $21,000 at the end of 20 years. a) If money is worth 15% per year to you, is this a good deal? b) How much should he give you at the end of 20 years for you to be indifferent?