answer with small explanation

QUESTION 20 Fundamental sources of contract law include: O Common law and the UCC. O Common law, but not the Uniform Commercial Code. O The uniform commercial code, but not common law. O Only the CISG. O Only uncommon law. QUESTION 13 An implied-in-law contract is: O A formal legal version of a contract. O An implied contract. O An express contract. O Either an implied or an express contract. O Not a contract at all. QUESTION 3 A contract is a promise: O For the completion of which the law gives a remedy. O For the breach of which the law in some way recognizes a duty. For the completion of which the law in some way recognizes a duty. For the breach of which the law recognizes a reward. O All of the above