the following ad appeared in the Imperial Valley Press: For Sale: Stolen black diamond earrings, rare, beautiful, retail value: $600, Asking price is $10. First come, first served. Contact Tate at 555-5599. Kate was the first to contact Tate, and show up to buy the earrings. Kate tendered $10 to Tate, who gave her the earrings. Is there an enforceable contract between Tate and Kate? Fully explain your decision, and your reasoning.