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?