When Betty Buyer's automobile-purchase contract crossed his desk, Dubious became concerned whether she could pay; he emailed her to that effect. That afternoon Dubious got a telephone call from Betty's mother, Martha Buyer, in whichas Dubious understood itMartha said, "Give Betty the credit. I'll see to it that it's paid." Betty failed to pay and Dubious wanted to collect the money from Martha as surety; she raised the statute of frauds as a defense. Is Martha's alleged promise enforceable? Decide and explain.