Mark has decided to retire and sell his business. The primary asset used in the business is a retail building with an adjusted basis of $200,000. A prospective buyer has offered to pay Mark $500,000 for the building but only has $150,000 cash available. The buyer has offered to give Mark a note for the rest of the purchase price, $350,000. Starting in the year after the sale, the buyer will pay Mark $35,000 per year on the note plus interest at a rate higher than what Mark could otherwise get on his investments. a. How much gain would Mark recognize on the proposed sale in the year of sale? $ b. How much gain would Mark recognize, if any, in the year after the sale? $