Joe and Cathy have a child together. Joe has been ordered by the Court to pay child support to Cathy for the benefit of their child. He is $3,000.00 in arrears (behind) and offers to pay all the back support he owes in return for Cathy giving him a car that she is trying to sell for $2,500.00. Frustrated with trying to recover the money for their child, she finally agrees and signs a contract Joe had prepared setting forth the aforementioned terms. 1. Is this contract enforceable? 2. Why or why not (specifically name and describe the applicable rule)?