Indicate whether each of the following statements is true or false. a) The amount of warranty expense is an estimate that is based on the amount of morchandise sold. b) A warranty obligation only occurs if a buyer purchases an extended warranty. c) When a warranty claim is settled, the seller's equity decreases. d) When a warranty claim is settled, the seller's liabilities increase. e) Product warranties usually represent legal liabilities that must be reported in the financial statements