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