Please answer all parts

12-2. Offer and Acceptance. Schmidt, the owner of a small business, has a large piece of used farm equipment for sale. He offers to sell the equipment to Barry for $10,000. Discuss the legal effects of the following events on the offer: (See Elements of Agreement.) (a) Schmidt dies prior to Barry's acceptance, and at the time he accepts, Barry is unaware of Schmidt's death. (b) The night before Barry accepts, fire destroys the equipment. (c) Barry pays $100 for a thirty-day option to purchase the equipment. During this period, Schmidt dies, and later Barry accepts the offer, knowing of Schmidt's death. (d) Barry pays $100 for a thirty-day option to purchase the equipment. During this period, Barry dies, and Barry's estate accepts Schmidt's offer within the stipulated time period