While negotiating with stewart to purchase his house, yasmine asks him about the condition of the roof. "excellent," he replies. "it is only 2 years old, and should last 25 more." in fact, stewart knows that the roof is 26 years old and has had a series of leaks. the parties sign a sales contract for $600,000. a week before yasmine is to pay for the house and take possession, she discovers the leaks and learns that a new roof will cost $35,000. what kind of contract exists between yasmine and stewart?